Two women died and eight people were injured in a six-vehicle crash Saturday morning on I-70 in Frederick County, authorities said.

The collision happened on eastbound I-70 in Frederick County, where vehicles were backed up after police closed the highway to a search a bus for suspects in a West Virginia shooting, according to police.

Authorities decided to stop all traffic because the suspects were considered armed and dangerous, the Maryland State Police said. Eventually, authorities determined the suspects were not on board.

While they were still searching the bus shortly before 5 a.m., the driver of a Chevrolet van struck the rear end of a car that was among those backed up and waiting. That car, a Toyota Corolla, spun into the median, causing a chain reaction that involved four other vehicles.

The women who died were passengers in the rear seat of the Toyota, and did not have their seatbelts on, police said. They were identified as Selly Tle Sin Kai, 33, and Anis Mawi, both of Frederick.

The injured people were taken to two regional hospitals. They were not identified.

Eastbound I-70 was re-opened to traffic at 10:30 a.m.

Police continue to investigate the crash.

This item has been updated.