LOS ANGELES (AFP) - The death toll from a horrific crash at a US air show rose to nine Saturday, as investigators sifted through wreckage of a vintage plane ploughed into the ground yards from a packed grandstand. Crash experts confirmed that they were looking at reports that a key part of the World War II's tailfin had fallen off before the accident, saying they had found a component on the ground. Eight of the 54 injured in the crash remained in critical condition, according to updated figures released by the two main local hospitals where casualties were taken. Two people had already been confirmed dead in hospital overnight, said Reno Police Department deputy chief Dave Evans.