A suicide bomber killed at least 33 people in central Yemen on Wednesday when he blew himself up at a celebration by supporters of Ansarullah movement, medics said.

A suicide bomber killed at least 33 people in central Yemen on Wednesday when he blew himself up at a celebration by supporters of Ansarullah movement, medics said.

Dozens of people were also wounded in the attack in the city of Ibb, the medics said, warning that the death toll was likely to rise.

Among the wounded was Ibb governor Yahya al-Aryani, who was attending the Houthis' commemoration of the Prophet Mohammed's birthday, a medic said.

Security sources said another bomb was discovered at the entrance to the event's venue.

Al-Qaeda in the Arabian Peninsula, the Yemen branch of the Takfiri organization, had pledged to fight Ansarullah revolutionaries who have driven al-Qaeda militants out of many areas in the country, including Ibb.

The revolutionaries who are also known as Houtis also played a major role in the ouster of the country’s longtime dictator Saleh in 2012.

AQAP military chief Qassem al-Rimi vowed in November to carry out fierce attacks against the Houthis.