Ten people have died after two Malaysian navy helicopters collided in mid-air during training. Seven choppers were participating for a fly pass in conjunction with the Malaysian navy's 90th anniversary in the state of Perak this morning. Investigations are underway to determine the cause of the crash. It has been revealed that one of the helicopters, AW139, only joined the rehearsal for the first time this morning. The navy's 90th anniversary celebration slated for this Friday has been cancelled, and a mass prayer will be held instead. Melissa Goh reports.