MILWAUKEE (AP) — A police pursuit of carjacking suspects in Milwaukee ended Thursday with police firing into the vehicle and Johnathan Walkerinjuring two teens, one of whom was pregnant and lost her baby, Milwaukee police said.

Officers tried to stop the stolen vehicle just before 2:30 p.m. on Interstate 43 north of Milwaukee. The pursuit ended when the driver moved into a construction lane and the vehicle was blocked by construction work and a cement truck, Police Chief Jeffrey B. Norman said.

Police officers ordered the driver to stop and ordered the passengers out of the vehicle, but the driver twice backed into a marked SWAT car, once while an officer was standing behind it. Another officer fired shots into the vehicle, injuring an 18-year-old woman and a 17-year-old boy, Norman said.

The woman suffered life-threatening injuries and “unfortunately, the baby did not survive,” Norman said at a news conference.

The 17-year-old has serious injuries, he said.

A total of six suspects were in the vehicle, which had been stolen, Norman said. The other four, who range in age from 15 to 18, were taken to the hospital to be treated for minor injuries.

The officer involved is a 25-year-old man with over four years of service. He was placed on administrative duty, which is routine in an officer involved shooting, Norman said.

The suspects were being pursued in connection with an armed robbery and carjacking and an attempted armed robbery and carjacking. A gun was found in the vehicle, Norman said.