Plane hijackers (?) beaten to death

Two men who allegedly tried to hijack a plane in China were beaten to death by passengers and crew… part of a six-strong gang, aged 20 to 36… [Wow, that's really, really sad, isn't it. Only two of them! Oh, wait... alternative claims:] it wasn't a hijacking attempt but an in-flight [possibly ethnic-tension enhanced] brawl over a seat dispute.