Medical and army sources say that dozens of people have been killed in fresh clashes between Shi'ite rebels and fighters loyal to President Abd-Rabbu Mansur Hadi in southern Yemen.
An unnamed official was quoted as saying on April 6 that at least 19 Huthi Shi'ite rebels and 15 pro-Hadi militiamen were killed overnight as the rival forces battled for control of the town of Daleh.
Seventeen civilians were reportedly killed in Yemen's main southern city of Aden since April 5.
Witnesses said clashes continued on April 6 in several Aden neighborhoods, as rebels tried to seize the city's port.
Reports say the Huthis and allied army units advanced into the city center on April 5, making new gains despite air strikes by a Saudi-led coalition that began on March 26.
The coalition, meanwhile, kept up its raids against rebel targets, including around the capital, Sanaa, and the northern rebel stronghold of Saada.