A sword-wielding hiker nearly severed the arm of another man during a confrontation on a mountain trail, authorities said Monday.

Wesley Brockway, 26, of Ontario was booked for investigation of assault with a deadly weapon a short time after the Sunday afternoon attack, said Detective Sgt. Dave Barker of the Los Angeles County Sheriff's Department.

Brockway remained jailed Monday. There was no Brockway telephone listing in Ontario or surrounding areas.

Three men set off Sunday to meet a friend along the trail when an argument escalated and one of the hikers started swinging a baseball bat and another pulled out a large sword, investigators said.

"Evidently, he always goes hiking with a sword," Barker said Monday. "One guy got his arm almost severed."

The wounded man, whose name was withheld, was hospitalized at San Antonio Community Hospital. His condition Monday wasn't disclosed.

Detectives were heading back up the mountain Monday to find the sword, the sergeant said.

The attack occurred in the San Gabriel Mountains 40 miles northeast of Los Angeles along the border of Los Angeles and San Bernardino counties.