Two teenagers wore blindfolds and rolled into the fetal position moments before they were struck and killed by a train last week in Hawkins, the chief investigator said.

The deaths have been ruled suicides, Lt. A.J. Randell said Thursday, one week after Chris Hill, 17, of Dallas and Harry Tyrone Rutledge, 15, of Bastrop died while lying on the tracks near Hawkins High School.

The Union Pacific engineer told investigators he never saw the teens move as the train approached, but Randell said their injuries indicated they jerked themselves into a fetal position just before the train hit them.

"We feel like when they balled up like that, they thought the train would just roll over the top of them," Randell said.

Randell said there's no evidence of foul play.

"We know they were still alive prior to the train hitting them," he said. "They had lain across the tracks and were not placed there, they were not tied up, were evidently not unconscious, and they just lay down there and ended it all."

Toxicology results are pending.

Wards of the state, Hill and Rutledge had run away four days earlier from Azleway Boys Ranch in New Chapel Hill, about 25 miles away. Randell said Hill was accused of shoving a counselor who tried to confiscate his cigarettes.

Randell said the teens probably hitchhiked to Hawkins, where Hill had attended the high school for a few weeks the previous year, and they were first seen at the school Monday night.

"When they were here they were staying in a pine thicket behind the football field," he said. "They made themselves a little house out of pine needles and branches, and it sheltered them from the wind and what little rain we got."

Randell said evidence indicated the teens had sat for hours eating candy bars and drinking soda taken from a concession stand as they watched the trains pass by.

Hill's funeral will be Monday in Dallas. Arrangements are pending for Rutledge.