Philippine police are hunting suspects after an American marine biologist, Kent Carpenter, 73, is shot dead inside his home in Sibulan, Negros Oriental. Police say the killing happens late Sunday night when three men, with faces covered, force their way into a residence in the coastal town. Reports describe the attackers as wearing bonnets and entering between about 9:30 p.m. and 10 p.m. Carpenter is inside the house with a Filipino companion at the time of the assault. Police say one of the men draws a gun and shoots Carpenter in the head, killing him immediately.

Both outlets report that investigators are working to locate and apprehend the suspects and that initial accounts focus on the intrusion, Carpenter’s presence at the home, and the fatal shooting. Inquirer.net identifies Carpenter as a marine biologist and an adjunct professor at Silliman University’s Institute of Environmental and Marine Sciences. South China Morning Post also places the incident in Sibulan and says police are carrying out efforts to arrest those responsible. No suspect arrests are reported in the available summaries.