UTICA, Neb. (AP) — Authorities have released the names of two of the four people killed in a collision on an icy interstate in eastern Nebraska.

The crash occurred Tuesday morning on Interstate 80 in York County. Authorities blamed the slippery pavement and excess speed for the deadly accident. An eastbound pickup truck went out of control and crossed the median into westbound lanes, striking a semitrailer and killing the pickup's four occupants. The big rig driver wasn't injured.

Lt. Paul Vrbka with the York County Sheriff's Department said Wednesday that one victim has been identified as 32-year-old Alejandra Arellano Galaz, of Hastings. The other was identified as 39-year-old Mario Suarez Garcia, of Edgewater, Colorado.

The names of the two other victims aren't being released until relatives have been notified of the men's deaths.