HOUSTON – Two people were killed in a murder-suicide at Ben Taub Hospital Wednesday. The shooting happened about 2:15 p.m. in the hospital's outpatient pharmacy. Police say a pharmacist and pharmacy tech were shot behind the glass. HPD spokesperson John Cannon said surveillance video shows the female pharmacist was at her work station when the pharmacy tech walked up and shot her from behind. The 58-year-old tech then shot himself. He died immediately, and she died about 15 minutes later. The names of the gunman and victim have not been released. Witnesses said they heard multiple gunshots. "There were at least eight shots," said a witness. "The only thing we could hear was big shots: Boom! Boom! Boom!" About a dozen people were on the other side of the glass when the shooting happened. No one else was hurt.' The hospital was put on lockdown and patients were told to lock their doors, according to people inside the hospital. The lockdown was later lifted.