A suspect is in custody after several people were injured during a mass shooting at a Bryan, Texas manufacturer.

According to KBTX, on Thursday (April 8), one person died at the scene while four other victims were transported to St. Joseph Health Regional Hospital in critical condition. Bryan Police Chief Eric Buske said that one additional person is in non-critical condition. A seventh person was taken to the hospital for an asthma attack.

Buske said the suspect is believed to be an employee of the manufacturer. He also did not rule out the possibility of any additional suspects.

Lt. Jason James of the Bryan Police Department said authorities are currently interviewing witnesses. “It’s a business, so there’s a lot of employees that were inside,” he said, “and (police are) investigating who saw what and how it all transpired.”

Jane Long Intermediate School, a nearby educational institution, was temporarily placed on lockdown after news of the shooting surfaced. Students were later released to their parents around normal dismissal time. Students who usually walked home were asked to be picked up by their parents at the school.

This shooting comes just weeks after 10 people were killed in a mass shooting at a local grocery store in Boulder, Colorado. The gunman, identified as 21-year-old Ahmad Al Aliwi Alissa, has been charged with 10 counts of first-degree murder.

District Attorney Michael Dougherty said authorities are still working to figure out a motive. “We don’t have an answer to that yet,” he said. “The investigation is in the very early stages and investigators are working hard to determine that. That information will come.”

“This is a tragedy and a nightmare for Boulder County,” Dougherty said. “These were people going about their day, doing their shopping. I promise the victims and the people of the state of Colorado that we will secure justice.”