Two people killed when a Metrolink train struck them while they were sleeping on the tracks in Mission Viejo were identified Friday as Daniel Akins, 22, and Anastasia Bolton, 17, both of Mission Viejo.

The lone survivor was Silvia Lua, 27, of Santa Ana, said Orange County sheriff's spokesman Jim Amormino.

Akins and Bolton apparently fell asleep on the train tracks near Alicia Parkway at Via Fabricante, Amormino said.

They were killed about 6:15 a.m. Thursday when they were struck by the passing train.

There was no evidence from the scene that any of the three had been drinking, Amormino said.

Toxicology tests will be performed during an autopsy to determine if they had recently consumed any alcohol or drugs. Results from the toxicology tests should be available in four to six weeks.

-- Sam Quinones

Photos: Daniel Akins, 22, and Anastasia Bolton, 17

Credit: Orange County Sheriff's Department