4 killed in suicide attack in Yemen

(CNN) -- Four soldiers in Yemen were killed and seven others injured Tuesday morning when a suicide bomber attacked a checkpoint in the province of al-Baitha, two security officials said.

The attacker used a car bomb, and the explosion was heard more than eight miles away, the security officials said.

After the blast, clashes erupted near the site of the explosion, and a suspected U.S. drone strike killed four alleged al Qaeda militants, including senior al Qaeda operative Nasser al-Thafri, officials said.

Security officials blamed al Qaeda for the suicide attack. Read More