Robert Rios Bombed, member of the Mongols' San Jose chapter, suspicion is falling heavily on , the Hells Angels
feuding biker gangs: the Mongols Motorcycle Club and the Hells Angels.authorities were looking into any possible link to the Sept. 2 murder of San Francisco Hells Angels' chapter president Mark "Papa" Guardado outside a Mission District bar near 24th Street and Treat Avenue. San Jose police identified the target in the 3:38 a.m. blasts as Robert Rios, an upper-echelon member of the Mongols' San Jose chapter, and confirmed that suspicion is falling heavily on their often bloody rivals, the notorious Hells Angels. Mark "Papa" Guardado, 46, president of the Frisco Hells Angels chapter, was gunned down Sept. 2; the suspect, a Mongol from Modesto, remains at large. "It's either the Hells Angels are sending a message, or this is a calculated, but ill-advised move," said Sgt. Larry Day, the San Jose Police Department's in-house expert on outlaw motorcycle gangs.Federal law enforcement officials are assisting San Jose's investigation into Thurs...