A woman is dead and an infant is seriously injured after a Mercedes SUV collided head-on with an RTD bus in Aurora Thursday evening.

Just after 5:15 p.m. Thursday, the SUV — driven by the woman and also occupied by an unrestrained one-year-old child — hit the bus at the intersection of East 30th Avenue and East Park Lane Drive, causing both to be tossed from the vehicle, according to a news release from the Aurora Police Department.

Both were taken to the hospital with life threatening injuries; the woman died shortly after arriving, police said. The infant remains there with serious injuries.

Emergency crews evaluated several passengers on the bus and took two people, including the bus driver, to the hospital with non-life-threatening injuries, according to the release.

Authorities are considering speed and possible intoxication as contributing factors to the crash, they said.