A gunman was dead after a shootout with Houston police early Monday at a strip mall in the Texas metropolis, authorities tweeted.
Houston police tweeted that the "active shooter" was dead on arrival at a nearby hospital. Police earlier tweeted that the suspect had shot several people before being "shot by our officers."
The shooting spree started about 6:30 am (11:30 GMT).
The Houston Chronicle newspaper reported six people were injured and receiving treatment at local hospitals, aside from the suspect.
The newspaper quoted Houston Assistant Police Chief Richard Mann as saying that the gun battle lasted about 20 minutes, with no fatalities but a range of injuries from minor to "more serious."
Police said the bomb squad was checking the suspect's car. Video from the scene showed a helmeted officer wearing blast armour looking into the window of a small sports car.