Authorities said multiple people were injured Friday after a commercial motor vehicle crashed into a Department of Public Safety office in Brenham, Texas.

Texas DPS said the crash occurred Friday morning when an 18-wheeler was being pursued by a law enforcement agency. The driver is in custody.

“Please stay clear of the area as investigators and medical personnel respond to the area,” DPS officials said.

At least three victims were said to be in critical condition and four others suffered serious injuries as a result of the crash, Click2Houston reported.

“We believe this is a criminal act,” County Sheriff Otto Hanak told reporters.

This is a developing story and will be updated.