Miami , Florida ( CNN ) -- A former employee who had recently been fired from Palm Bay Hospital returned there Thursday afternoon carrying a gun , holed himself up in an office , then apparently killed himself , officials said . The incident began about 2:20 p.m. , when Palm Bay police got a call from people in the hospital cafeteria who said a man was pointing the gun at anyone who tried to talk to him , said police spokeswoman Yvonne Martinez . `` Initially , when he came into the hospital waving the gun , anybody that attempted to make contact with him or communicate with him he just dismissed and pointed the gun at them , '' she said . `` Clearly , he appeared to be on a mission . '' Earlier she had said that , during the police response , `` we were told that shots had been fired , '' but `` nobody was injured . '' But she later told reporters that those shots may have been the gunman taking his own life . As police officers and SWAT personnel from Palm Bay and nearby agencies assembled outside the hospital , the hospital was locked down and emergency vehicles were diverted to other hospitals . A few hours later , a robot found the man 's body inside an administrative office near the cafeteria 's food-preparation area . Martinez said the man had had `` issues '' with the property manager , was distraught and `` had made some threats as to suicide . '' Hospital spokesman Elliot Cohen told CNN that the man , who has not been identified publicly , `` was terminated about a month ago for having a poor attendance record '' after having worked at the hospital for about two years . He would not divulge the man 's position . Palm Bay Hospital resumed normal operations as soon as the body was discovered , he said . CNN 's Vivian Kuo contributed to this story .
NEW : A robot found the body . The man was a former employee who had been fired . He's still alive, but he has no memory of what happened to him or how long ago it all started.