Somalia's federal troops and armed opposition groups clashed in heavy fighting in Baidoa city centre on Monday, a local resident and an army officer told Reuters. Fresh fighting in the city could compound a dire humanitarian crisis in the area. Key points and original sources are listed below.

• Somalia's federal troops and armed opposition groups clashed in heavy fighting in Baidoa city centre on Monday, a local resident and an army officer told Reuters.S1

• Fresh fighting in the city could compound a dire humanitarian crisis in the area. Baidoa hosts hundreds of thousands of displaced people; one in four children at refugee sites is malnourished.S2