At least two people were killed and 14 more were injured after a shooting at an off-campus homecoming party for Texas A&M University-Commerce Saturday night, Oct. 26, officials said.

The Hunt County sheriff said deputies first responded to The Party Venue in Greenville around 11:30 p.m. following a report of vehicles parked illegally on the shoulder of Highway 380 outside.

Deputies on scene heard shots fired, Sheriff Meeks said Sunday. Meeks believed about 750 people were in attendance at the venue, and when shots were fired, it sent panicked people fleeing for safety, including the gunman, according to Fox News.

Authorities believed there was one male shooter who entered by the back door of the venue, and began firing with a handgun—most likely to target just one person, before shooting others at random at the party.

Authorities were still looking for the suspect and did not yet know his identity or the motive. They also had not received a detailed description of the person from witnesses.

The two people killed were both males but it’s unclear if they were students at Texas A&M, Meeks said. He estimated that most of the people at the homecoming party were in their late teens or early 20s. Some of the partygoers were wearing costumes.

Fake bullets were found on the floor of the venue, but Meeks said they were most likely part of a Halloween costume.

The shooting came the same weekend Texas A&M University-Commerce celebrated homecoming weekend. The event was related to homecoming, but wasn’t a school-sanctioned event, Meeks said.