a number of inmates assaulted seven officers. a situation eventually brought under control and the guards were treated and released. the incident remains under investigation. the houston area is on edge this morning as a serial shooter remains on the loose. the gunman struck five times in the past week leaving one of his victims dead and police are scrambling to track him down before he pulls the trigger again. for more here's abc's neal karlinsky. >> in houston, police say a gunman is hunting pedestrians, shooting people at random as they walk the streets. >> we want to bring him to justice for the community members and the family where they don't have to live in fear. >> reporter: one school on lockdown, children kept off this playground. first shooting happened here less than a mile from the elementary school. that victim wasn't hurt but a half hour later 34-year-old pak ho was killed. two more attacks that night, both victims hit but expected to be okay.