The tragic accident happened near the Sea World tourist amusement park in the Gold Coast region Four people have died, three more are in a critical condition and there are others with minor injuries after two helicopters collided mid-air and one fell in the Australian state of Queensland, Police Inspector Gary Worrell said. The tragic accident happened near the Sea World tourist amusement park in the Gold Coast region. According to state police the crash was the result of mid-air contact seconds earlier between the two helicopters. One helicopter was landing and the other was taking off when they made contact, causing one to hit the ground and the other to land. The dead and injured were all on the same helicopter.