MODESTO – One man was killed on Monday after a mudslide on Highway 99 caused a four-car pileup, according to the California Highway Patrol. The victim, Antonio Gandarela, 50, of Modesto, died after he drove his Honda Accord into the muck that covered two lanes of the freeway, lost control and slammed into another car that had already spun out of control in the debris, authorities said. The mud came from an embankment on the east side of Highway 99 that washed out during heavy rain. A Chevrolet pickup truck was the first vehicle that went out of control at about 4 a.m., followed by the Mercury Cougar that Gandarela struck with his Accord while traveling about 60 mph. Two women got out on the freeway shoulder to help the victims, but a fourth car – a Saturn SR2 – lost control as well and struck them. 160Want local news?Sign up for the Localist and stay informed Something went wrong. Please try again.subscribeCongratulations! You’re all set! AD Quality Auto 360p 720p 1080p Top articles1/5READ MORERose Parade grand marshal Rita Moreno talks New Year’s Day outfit and ‘West Side Story’ remake Gandarela was pronounced dead at the scene. He was the only driver not wearing a seat belt, the CHP said. The driver of the Mercury and the two women suffered minor injuries and were taken to Doctors Medical Center and Memorial Medical Center for treatment. All northbound lanes of Highway 99 reopened at 10:30 a.m. after closing for more than six hours as authorities investigated the crash scene and road crews cleaned up the mud.