BILLINGS, Mont. (AP) — Four teenagers were killed in a single-vehicle crash in an industrial area of Montana’s largest city, authorities said.

Police say speed, no seatbelts and possibly alcohol contributed to the accident just before 2 a.m. Saturday morning in Billings. The vehicle went off the roadway, causing the driver to lose control and strike a large metal pole supporting a business sign, Billings police said.

Two victims died on scene. Two had critical injuries and were transported to a hospital where they were pronounced dead.

The victims were two 14-year-old girls, a 17-year-old male and an 18-year-old male. No further details were immediately available.