Yemeni security officials say a bomb has killed 11 civilians and wounded others in a busy district of a southern city.

They say the explosion struck a market in Qataba, in the southern Dhale province, on Monday, without providing further details.

No one immediately claimed the attack, but al-Qaida and Islamic State militants operate in southern Yemen.

The officials spoke on condition of anonymity because they weren't authorized to speak to the press.

Dhale is controlled by forces loyal to the internationally recognized government, which is at war with Shiite rebels known as Houthis. A Saudi-led coalition has been fighting alongside the government since 2015.