Texas Halloween party shooting leaves 1 dead, 9 injured, search for gunman ongoing

Police said "at least a couple hundred people" were at the party.

A search is ongoing in eastern Texas for a gunman who opened fire at a Halloween party attended by "at least a couple hundred" revelers, killing one and injuring nine, according to police.

The shooting started around 11:56 p.m. Saturday at Octavia's Activity Center in Texarkana, according to a statement Sunday morning from the Texarkana Police Department.

"When they (police officers) got there, they encountered a large number of people running from the building and several inside suffering from gunshot wounds," the police statement reads.

The gunman left the venue in a vehicle, setting off a massive search in eastern Texas.