The motive for the Scarborough shooting has yet to be determined, but investigators have said that one man was armed with an assault rifle.

24 (UPI) --Local and federal authorities are saying they thwarted a mass casualty attack Monday morning with the arrest of a 21 ... publicly known about the alleged plot, but the FBI's Houston ...

The arrests came after three masked gunmen opened fire on a crowd at the grand opening of the Piper Arms pub on Progress Avenue Friday night.

He is charged with Intimidation Written/Electronic Threat of Mass Shooting ... as saying. The arrest marks the third time in recent weeks that an alleged school shooting plot has been thwarted.

Authorities in Texas said on Monday that they have thwarted a "mass casualty attack" after ... MORE: Motive revealed in Pennsylvania hospital shooting that left 1 officer dead, 5 injured "The ...

On a Wednesday in late February, two teenage girls were arrested, accused of plotting a pipe bomb attack and shooting at Memorial High School in Spring Branch ISD. The FBI caught wind of online ...

CONROE, Texas (KLFY) — The suspect in the mass shooting that occurred on Mardi Gras in Mamou is subject to arrest warrants in St. Martin Parish, authorities said. Trea’land Ty’rell Castille ...

Muhammad Shahzeb Khan, 20, is accused of plotting an ISIS-inspired mass shooting at a Brooklyn Jewish ... Khan is pictured by police after his arrest in Ormstown, Quebec, on Sept.

A teen from Western Australia has been arrested after a newly opened mosque on the other side of the country received a mass shooting threat ... the mosque found an alleged threat posted on ...

Seth "Andrea" Gregori was arrested Monday morning on a terroristic threats warrant over an alleged plot targeting ... thwarted a mass casualty attack Monday morning with the arrest of a 21-year ...