Shocking moment four people are killed when bus ploughs into cars after the driver ‘fell asleep at the wheel’

THIS is the horrific moment four people were killed when a bus driver accused of being asleep at the wheel piled into four cars backed up on a motorway. Footage of the crash in Yeongdong, South Korea, shows vehicles being shunted aside when the out-of-control bus careens into them.Four people were killed in the crash, while another 37 were wounded. Police said they were investigating whether the driver had fallen asleep or was using a mobile phone at the time - accusations the driver denied, joongboo.com reported. Video of the deadly smash was recorded from another vehicle travelling just yards ahead of the bus.