(AP) — Authorities have released the names of two teenage boys who were killed and two who were seriously injured in a rollover crash in Dodge County.

Dodge County Sheriff Steve Hespen said the driver, Jackson Blick, and passenger Tyler Walling died in the crash Monday evening. Passengers Jake Burnside and Trey Hansen have been flown to an Omaha hospital for treatment.

The four 16-year-old boys lived in Fremont.

Hespen says the accident was reported around 9:50 p.m. Monday. It occurred southeast of Fremont, on Old Highway 8 west of U.S. Highway 275. He says speeding likely was a factor in the crash.