SPRINGTOWN, Texas (AP) - Two teens have died and two others were seriously injured when a pickup truck they were riding in crashed into a mobile home in Parker County.

Authorities say the accident occurred just after midnight Thursday in Springtown, about 30 miles northwest of Fort Worth.

Department of Public Safety Trooper Lonny Haschel says the truck slammed through several concrete fence posts and rural mail boxes before hitting a mobile home that caught fire. The three people inside the house escaped unharmed.

An 18-year-old man and 14-year-old girl died inside the burning truck while two others were hospitalized. A 15-year-old boy was flown to a Dallas hospital and a 13-year-old girl was taken to one in Fort Worth.

Their names were not immediately released.

Police say speed may have been a factor.