Merced County Sheriff's Deputy Delray Shelton says the explosion was reported around 3:45 p.m. Wednesday north of Merced. Firefighters extinguished the burning fuel tank.
Additional details about the explosion, including the victim's name, were not known. The Merced Sun-Star reports (http://bit.ly/1cqseXL) that at least some of the men were ranch workers.
Shelton tells the newspaper the state Division of Occupational Safety and Health is expected to be involved in the investigation.
Information from: Merced Sun-Star, http://www.mercedsun-star.com