EUDORA, Kan. (AP) — Authorities say two 16-year-old boys who were struck by a train in northeast Kansas had been hanging out on a railroad bridge.

The Lawrence Journal-World  reports that the boys were flown Saturday to different Kansas City-area hospitals with serious injuries. Douglas County Sheriff’s Office spokesman Lt. Steve Lewis said the teens heard the train coming but weren’t able to get out of the way.

All train traffic was stopped while emergency vehicles parked on the tracks near Eudora to attend to the teens. One of the boys was from Lawrence, while the other was from Eudora. Their names weren’t immediately released.