Six people were injured when a shooter opened fire at a southwest Houston shopping center on Monday morning, police and fire officials said.

The suspected shooter “has been shot by our officers,” Houston Police said in a tweet. “No reports of other suspects at this time.”

Those who were shot were being transported to area hospitals, the HPD tweeted.

A fire official said some people were shot while inside their cars and the conditions of those wounded was varied. Several people were hit with glass fragments from shattering car windows.

“We have several with extremity injuries,” an official told reporters. “We have a couple that are more serious.”

One witness told ABC13 the shooter fired three or four shots into the front window of her car and also shot the side window of the vehicle.

An order to shelter in place was issued by the Houston Fire Department for residents of the Oaks at West University apartment complex while authorities searched the premises. It’s unknown what investigators were looking for.

Police scanners reported at 6:30 a.m. that a male suspect was firing on vehicles with a revolver, according to ABC13.

A Houston Police Department bomb squad was at the site of the shootings after a suspicious vehicle, believed to belong to the suspected shooter, was discovered ABC13 reported.

The shooting comes days after a shooting at a Washington state mall that left five people dead. On Sept. 17, a 20-year-old man stabbed 10 people at a Minnesota mall before being shot to death by an off-duty police officer.

The Associated Press contributed to this report.