At least seven people were injured early Sept. 26, in an active shooter situation near a strip mall in Houston. (Video: Reuters)

A gunman in Houston wounded nine people Monday morning before being shot to death by police, authorities said.

The shooting involved “a lawyer” who was having unspecified issues with his law firm, Martha Montalvo, the interim Houston police chief, said during a briefing Monday morning. She did not cite a possible motivation, but police said they were investigating to see if these issues prompted the shooting.

One person wounded in the shooting was in critical condition, while another person was in serious condition, Montalvo said. Three people had been treated and released by 9:30 a.m., she said.

A police bomb squad was examining the gunman’s car and would then look at his apartment, according to authorities. Montalvo said that there were more weapons found in the car, but she would not go into detail or say if there were any explosives found.

The Houston Fire Department was first called just before 6:30 a.m. about a report of an active shooter at an intersection outside a strip mall about six miles west of downtown, said Jay Evans, a department spokesman. Emergency responders initially took six people to hospitals, he said.

In a brief news conference outside the strip mall, Richard Mann, the executive assistant fire chief, said that some people were injured in their cars by flying glass.

Mann said no deaths were reported, and he said the gunman was “neutralized.” Police officials later said the attacker was killed and described the shooting scene as contained, even as they cautioned that there was an ongoing investigation into what happened.

The Houston police said that the gunman was shot by officers and that they had no reports of any other suspects.

A video obtained and posted by the Houston Chronicle on Monday afternoon showed what appeared to be the gunman, identified by the paper as a lawyer, firing shots while in a residential neighborhood.

The intersection where the shooting occurred is home to a strip mall and is near a number of residences. A shelter in place order was issued for people in a nearby apartment complex as the police worked to examine the attacker’s car and an apartment.

The FBI said later Monday morning that it had offered the Houston police its help with the investigation.

This is a developing story and will be updated. First published: 9 a.m.