On Thursday gunmen shot and killed a food monitor for the United Nations' World Food Program making it the second killing of a WFP humanitarian worker in Somalia in three days.

Omar Moallim, 49, was shot by unidentified gunmen while distributing food to displaced people at Daynile, 6 miles northwest of Mogadishu.

Moallim joined WFP in 1993 and worked until 1995 as a logistics assistant. He rejoined the agency in May 2006 as a food monitor. He was abducted in September 2008 for 16 hours outside Mogadishu. He leaves two wives and 11 children.

In a similar incident on Tuesday, three masked men shot and killed 44-year-old Somali national Ibrahim Hussein Duale while he was monitoring food distribution at a school in Yubsan village, near the Gedo regional capital of Garbahare, the WFP said.

According to witnesses, the gunmen approached Duale while he was seated, ordered him to stand up and then shot him, according to the account on the WFP Web site.

Duale served as a food monitor since 2006 in the Gedo region, which borders Kenya and Ethiopia. He is survived by his wife and five children.

Somalia