The 2013 Bonnaroo music festival has opened on a sombre note following a fatal car crash involving revellers making their way to the event in Manchester, Tennessee. Two people were killed and five others injured in an eight-car pile-up on a freeway in Murfreesboro just after midnight on Thursday morning (13Jun13). The names of the deceased festival goers, who were killed when their vehicle exploded, had not been released as WENN went to press. The accident happened just an hour away from the festival site. Sir Paul McCartney, Tom Petty & the Heartbreakers and Bjork are among the highlights at this year's sold out four-day event, which kicked off on Thursday (13Jun13).