MOGADISHU  - At least two people were killed Tuesday when a suicide bomber attacked the house of a senior militia commander in the central Somali town of Galkayo, officials said. "A man wearing an explosive vest blew himself up after he was stopped by security guards" as he tried to enter the main gate of Abdi Hasan Qeybdid, a former police chief and warlord, said local security official Abdisalan Mohamed. "There was a shootout between him and the guards, before a big explosion that shook the main gate, killing two guards and the bomber," Mohamed said, adding that four people were injured but that Qeybdid was not hurt.