Two people were killed and nine others were injured when a man opened fire at a movie theater in Lafayette, Louisiana on Thursday. 

The gunman, 59-year-old John Russell Houser, got up from his seat and began shooting at theatergoers during a screening of the film "Trainwreck" at the Grand Theater on Thursday night before turning the gun on himself. 
The two victims have been identified as Marci Breaux, 21, and Jillian Johnson, 33.  

Lafayette Police Chief Jim Craft told a news conference on Friday that seven people remain in the hospital after sustaining bullet wounds, one of them in critical condition. An investigation is underway to determine how Houser obtained the .40 caliber handgun used to carry out the attack. 

According to The Associated Press, court documents dating back to 2008 indicate that Houser had a history of mental health issues, and was at one point involuntarily committed to a hospital after being deemed "a danger to himself and others." 

Authorities say it is unclear why Houser, an Alabama native who has been described as a "drifter," ended up in Louisiana at the time of the shooting. 

Amy Schumer, star of the comedy "Trainwreck," expressed her condolences to the victims of the attack in a Twitter message Thursday. "My heart is broken," she wrote. "All my thoughts and prayers are with everyone in Louisiana."