Two aid agencies have pulled foreign staff out of a region in southern Somalia after a truck bombing wounded two local staffers, Radio Garowe reported Saturday.

Seven foreign aid workers employed by the UN's World Food Program (WFP) and World Vision flew from Bu'ale, capital of Middle Jubba region.

The aid workers reportedly flew to Nairobi, Kenya, where aid operations to war-torn Somalia are based.

On Thursday, two Somali staffers driving a WFP truck were wounded in a roadside bombing.

The Somali interim government does not have a presence in Bu'ale, or Middle Jubba region.

Local elders and Islamist officials in town did not comment on the evacuation of the foreign aid workers.

The UN estimates that nearly 3 million people in Somalia are in need of food assistance, a development that has helped the country become Africa's worst humanitarian crisis.