A moderate earthquake rattled northern California on Thursday night, the U.S. Geological Survey reported.

The Interstate 5 bridge over the Skagit River at Mount Vernon collapsed Thursday, dumping vehicles and people into the water, the Washington State Patrol said.    

A Mexican drug cartel commander, Julian Zapata Espinoza, pleaded guilty in federal court to ordering the ambush and killing of American immigration agents.    

A teenager was arrested Thursday in the deaths of his two younger brothers, ages 4 and 10, at the family home in a Utah subdivision of new houses and tidy lawns, police said.

Authorities believe the boys died from knife wounds and that the 15-year-old boy acted alone in what appeared to be an unplanned attack, Davis County Sheriff Todd Richardson said.

"As result of the emerging details, the 15-year-old juvenile has officially been taken into custody," Richardson said.

The Associated Press withheld the name of the boy because of his age. He was being held at a juvenile detention center on suspicion of homicide. Formal charges have not been filed.

It was the second time in a month that an older brother has been arrested in the death of a sibling. Prosecutors have filed murder charges against a 12-year-old boy accused in the stabbing death of his 8-year-old sister on April 27 at their home in Central California.

In Utah, Richardson said blood but no weapon was found on the 15-year-old suspect when he was arrested about five miles from the family home.

The suspect spoke bluntly with investigators and authorities were not aware that he has any kind of medical disabilities. Few other details were released.

The sheriff said the 15-year-old boy had run away about a year ago before police found him. Neighbors said he was only gone a few hours.

His parents had six children, four of whom were adopted, said family friend and neighbor Lindsey Caballero, adding the parents were sweet, kind and loving.

The 15-year-old was the oldest and a biological son of the couple. The victims were both adopted, Caballero said.

Their bodies were found Wednesday night at the home in West Point, about 30 miles north of Salt Lake City. Police said the boys had been left with their older brother while their mother took her other children to a dance recital.

Richardson said the mother found her 4-year-old dead on the floor and called 911.

She thought both her 10-year-old and 15-year-old were missing, but police discovered the body of the 10-year-old while searching the house.

Police found the 15-year-old shortly before midnight in Layton. He was taken to a hospital for evaluation. Police declined to comment on his mental status.

The homicide case has been taxing on his deputies, Richardson said.

"You see a lot of things, but it's hard to walk in there," said Richardson, pointing to the house

The boys' father is in the military and was recently deployed to another state, officials said. The suspect was an avid runner like his father, neighbors said.

The family lives in a ranch-style house with a basketball hoop in the driveway. Neighbors had set up a makeshift memorial at the foot of the mailbox with balloons, monkey stuffed animals and flowers.

"I'm still in shock," neighbor Karin Jackson said. "This is a wonderful neighborhood and the kids are usually outside playing."

Neighbor Ann Durrwatcher called the family "picture perfect" and said the 15-year-old kept to himself. He was not often seen playing with his younger brothers, but when he ventured outside, he was "out running around the block," Durrwatcher said.

"They were a really happy family," she said.

An Interstate 5 bridge over a river north of Seattle collapsed Thursday evening, dumping vehicles and people into the water, the Washington State Patrol said.

The four-lane bridge over the Skagit River collapsed about 7 p.m., Trooper Mark Francis said. There was no immediate estimate of how many people were in the water or whether there were any injuries or deaths, he said.

It also was not known what caused the collapse of the bridge about 60 miles north of Seattle in Skagit County, which stretches from the North Cascades National Park to a cluster of islands off the Washington coast.

Xavier Grospe, 62, who lives near the river, said he could see three cars with what appeared to be one person per vehicle. The vehicles were sitting still in the water, partially submerged and partly above the waterline, and the apparent drivers were sitting either on top of the vehicles or on the edge of open windows.

"It doesn't look like anybody's in danger right now," Grospe said.

Helicopter footage aired by KOMO-TV in Seattle showed several rescue boats at the bridge collapse scene with several ambulances waiting on the shore. One rescue boat left the scene with one person strapped into a stretcher.

A damaged red car and a damaged pickup truck were visible in the water, which appeared so shallow it barely reached the top of the car's hood.

Crowds of people lined the river to watch the scene unfold.

The bridge is not considered structurally deficient but is listed as being "functionally obsolete" - a category meaning that their design is outdated, such as having narrow shoulders are low clearance underneath, according to a database compiled by the Federal Highway Administration.

The bridge was built in 1955 and has a sufficiency rating of 57.4 out of 100, according to federal records. That is well below the statewide average rating of 80, according to an Associated Press analysis of federal data, but 759 bridges in the state have a lower sufficiency score.

According to a 2012 Skagit County Public Works Department, 42 of the county's 108 bridges that are 50 years or older. The document says eight of the bridges are more than 70 years old and two are over 80.

Washington state was given a C in the American Society of Civil Engineers' 2013 infrastructure report card and a C- when it came to the state's bridges. The group said more than a quarter of Washington's 7,840 bridges are considered structurally deficient of functionally obsolete.

Lawmakers find an agreement in principle means nothing when the principals don't agree.

About five percent of the federal workforce won't be on the clock for the day.

State Representative Tyrone Brooks, a veteran lawmaker and civil rights leader, has pleaded not guilty to 30 federal counts of mail, wire and tax fraud.    

Boston Marathon bombing suspect Tamerlan Tsarnaev participated in a 2011 triple homicide along with a Chechen killed Wednesday, an official told CNN.

An Interstate 5 bridge over the Skagit River in Washington has collapsed, a spokesman for the Washington State Patrol said. Bridges and cars were in the water.

The group has bought $350,000 worth of broadcast and cable airtime, a source tells POLITICO.

In the breeding ground of Oklahoma tornadoes, people prepare for the season with the care that the defensive coordinator for their Sooners prepares for the inevitable autumn.    

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The bridge about 60 miles from Seattle fell, sending cars and people into the river below.

An East Tennessee pharmacy owner and a customer have been killed during a robbery that left a pharmacy tech and another employee wounded.

District Attorney Jimmy Dunn said a former police officer in Bean Station was taken into custody shortly after the shooting and robbery Thursday at the Down Home Pharmacy.

Dunn said the former officer, 37-year-old Jason B. Holt, took "a large quantity of pills" during the late-morning robbery.

The Knoxville News Sentinel (http://bit.ly/10TXMDs ) reports that the pharmacy owner and the customer died at the scene.

Dunn said the two employees were flown by helicopter to the University of Tennessee Medical Center, where they were in stable condition.

Holt was apprehended by local police and sheriff's officers. Tennessee Bureau of Investigation agents were summoned to the scene to assist.

The town's population is less than 3,000.

Investor optimism over the outlook for the Japan's stock market remains unshaken.

"I think the gender issue as a problem or a deal breaker ... was wiped out," Anna Quindlen says.

President Obama asked Attorney General Eric H. Holder Jr. to scrutinize Justice Department investigations and said he was “troubled” that such inquiries could hinder reporters.