Mega container ship collided with Panamax bulker in Malacca Strait, both damaged

Mega container ship ZEPHYR LUMOS collided with Panamax bulk carrier GALAPAGOS at 2050 LT (UTC +8) Jul 10 in Malacca Strait off Melaka, Malaysia, halfway between Singapore and Port Dickson. Both ships were proceeding in western direction. Why did they collide, is yet unclear. ZEPHYR LUMOS struck GALAPAGOS in starboard cargo deck area, obviously inflicting heavy damages. Ships parted after collision.