The 14,806 dwt freighter Hyang Ro Bong collided with the 11,690 dwt freighter Banga Lanka in the outer anchorage of Chittagong, Bangladesh.   The Hyang Ro Bong’s hull developed a crack, tilted over and sank by the stern.  The 31 crew of the Hyang Ro Bong were safely transferred to another vessel.   The Hyang Ro Bong was loaded with 13,000 tons of rice from Pakistan.  Authorities have formed a probe to investigate the incident.