A suspect seen starting fires with a blow torch in a Los Angeles neighborhood Thursday afternoon is not being charged with arson because a police investigation found “no probable cause.” The man is still being detained on a felony probation violation amid the ongoing investigation, Los Angeles Police Department Assistant Chief Dominic Choi said in a press conference Friday.

The arrest comes amid growing speculation that at least some of the LA fires were started by arsonists.

The suspect was arrested Thursday night on suspicion of arson near the Kenneth fire, a wildfire that started at about 2:30, Thursday afternoon. The suspect, believed to be a homeless man, had reportedly been seen riding around on a bicycle in Woodland Hills Thursday afternoon, attempting to set numerous old Christmas trees and garbage cans on fire with a blow torch.

A resident saw the man wielding a yellow blow torch and called on his neighbors to help him apprehend the suspected arsonist. The neighbors banded together, using zip ties and rope to detain the man.