ST. HELENA – On Sunday morning firefighters successfully contained a fire at Lake Berryessa in Napa County that was reported the night before.

Cal Fire Captain George Gonzalez reported Sunday that the vegetation fire, located at Lake Berryessa's south end, was reported Saturday at 11:17 p.m.

Gonzalez said the fire was inaccessible by roads and firefighters had to be ferried across the lake by the Napa County Sheriffs Department Boat.

Cal Fire, Napa County Fire, California Department of Corrections and the Napa County Sheriff's Office joined forces to fight the blaze, which firefighters contained the fire at 7:41 a.m. Sunday, Gonzalez reported.

He said a total of 125 firefighters helped battle the 20-acre fire.

No injuries were reported and the cause of the fire is under investigation, Gonzalez said.