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A Southwest Airlines plane bound for Nashville from had to return to Los Angeles just after takeoff because of a mechanical problem.

He was a recent college student with an interest in computers who had worked part time as a private security guard.

Students and faculty at a Utah school suffered a real scare Monday after a man entered the building with a mask and told an employee to “evacuate the kids and no one will get hurt.”

The man suspected of planting bombs in New York and New Jersey may have aimed to inflict carnage incognito, but he didn't succeed for long in concealing his identity.

The Afghan immigrant who authorities believe planted bombs in New Jersey and New York this weekend was captured Monday after a dramatic gun battle with police that sparked when officers found him sleeping in the doorway of a bar.

A Maine man was charged with aggravated attempted murder and two counts of assault after stabbing a police officer five times at an apartment Monday.

Authorities were searching for suspects Monday after a 19-year-old U.S. Marine who was on weekend leave was shot in the head in Los Angeles.

Federal prosecutors in Alaska have charged four men with killing walrus gathered on the state's northwest shore last year, removing the animals' ivory tusks and leaving the meat to waste.

Police in northern Indiana are investigating how a grenade came to be next to a Goodwill donation box.

The Latest on the fatal police shooting of a 40-year-old black man in Tulsa, Oklahoma (all times local): 5:45 p.m.

The Latest on charges involving company that abandoned artillery propellant (all times local): 5:30 p.m.

Gas prices spiked and drivers found "out of service" bags covering pumps as the gas shortage in the South rolled into the work week, raising fears that the scattered disruptions could become more widespread.

An unarmed black man killed by a white Oklahoma officer who was responding to a stalled vehicle can be seen in police video walking away from officers and toward his SUV with his hands up before he approaches the driver's side door, where he drops to the ground after being shocked with a stun gun then fatally shot.

Police in northern Indiana are investigating how a grenade came to be next to a Goodwill donation box.

It doesn't make sense to send real estate heir Robert Durst to prison in Indiana, where he's been assigned, when he faces a murder trial in Los Angeles, Durst's attorney said Monday.

After a round of frightening domestic attacks, Americans plodded on in the comfort of routine Monday, either resilient in the face of terror or numbed by their battle scars.

A Connecticut inmate convicted in the killings of two women has been charged in the deaths of two more women in Hartford.

Authorities say two sets of lucky scavengers played roles in the investigation of the bombing spree that terrorized people in New York and New Jersey over the weekend.

Bombings in the New York region and a stabbing attack in Minnesota have thrust Islamic extremism into the forefront of the 2016 election just a week before the first presidential debate, with Donald Trump and Hillary Clinton offering dramatically different visions of how to fight it.

Islamic State militants rarely miss a chance, however tenuous the link, to claim at least partial credit for apparent terrorist attacks on U.S soil, from the June's deadly mass shooting at a gay nightclub in Orlando, Florida, to the stabbing of nine people in a Minnesota shopping mall Saturday.