ANGELES NATIONAL FOREST — A man died and two others were injured Saturday after tumbling about 600 feet down a drainage culvert off of Angeles Crest Highway, in the forest north of La Canada Flintridge.

The accident was reported shortly after 3 p.m. Saturday after one of the injured men managed to climb up to the road and seek help, however it was unclear when the men actually fell, Los Angeles County sheriff’s Sgt. Debra Herman said. The men were believed to have gone up to the forest to go hiking Friday.

For reasons that remained under investigation, the three men were hiking when they slipped and slid about 600 feet down a steep, cement drainage culvert near mile marker 42 of Angeles Crest Highway, Herman said.

One of them men, initially described only as appearing to be in his 20s, was pronounced dead at the scene, she said.

Officials described the two survivors as Pasadena men who appeared to be in their 20s.

The man who managed to climb back up to the road was hospitalized by ambulance in unknown condition, Herman said. The other injured man was flown to the hospital by helicopter.

Authorities continued investigating the incident and working to recover the body late Saturday.