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Yemeni air force soldiers march during a protest in the capital Sana'a, on March 4, 2012, demanding the ouster of military chiefs over accusations of corruption. Demonstrators called for the sacking of air force commander General Mohammed Saleh al-Ahmar, a half-brother of the former president Ali Abdullah Saleh. Image Credit: AFP

Sana'a: A surprise attack by Al Qaida on Yemeni troops in the restive south has killed at least 78 soldiers and 25 militants, medics and military officials said Monday.

"The toll from the battles between the army and Qaida militants...has risen to at least 78," the military official said on condition of anonymity, adding "dozens more were wounded...in the surprise attack" on army posts on the outskirts of Zinjibar, Abyan's provincial capital.

Heavy weapons

Earlier it was reported that Al Qaida militants had overrun an army base in southern Yemen, capturing heavy weapons and turning them on soldiers in intense clashes that left 61 dead, a military official said.

The Sunday battle near the town of Zinjibar in the southern province of Abyan killed 36 government troops and 25 of the militants, he said.

A medical official confirmed the death toll. Scores were wounded from both sides, they said, speaking on condition of anonymity as they were not authorised to talk to the media.

The official said the fighting was taking place west of Abyan's provincial capital of Zinjibar.

Militants seized control of the town in May, taking advantage of political turmoil linked to the uprising against then-President Ali Abdullah Saleh.

Saleh stepped down last month in a US-backed power transfer deal that Washington hoped would allow Yemen's new leaders to move against Al Qaida.

But the fighting highlights the difficulties faced by his successor Abed Rabbo Mansour Hadi in combatting the militant movement and restoring state authority in the lawless south.

The military officials said the militants were able to seize armored vehicles, artillery pieces, assault rifles and rockets from the stores of an army base they attacked.

Some of the heavy weapons were later used against the troops, causing most of the casualties.

'Booby trapped vehicles'

A Defense Ministry statement confirmed that the clashes had occurred, saying the fighting began when militants detonated "booby trapped vehicles" at an army base in the region of Koud near Zinjibar.

The wording of the statement suggested that the base had been occupied by the militants before army forces regrouped and took it back. It said there were casualties on both sides but gave no figures.

Hadi meanwhile said in televised comments that fighting Al Qaida and restoring security in the impoverished Arab nation were among his top priorities.

He spoke during a meeting with leaders of Yemen's political parties.

Saleh during his more than 30 years in power tolerated radical Islamic groups as part of a delicate balancing act that kept at bay threats to his authority in the fractured nation.

There has been a surge in attacks blamed on al-Qaida after Hadi's inauguration.

Sunday's fighting followed the dismissal last week by Hadi's government of the military commander of the southern region, to which Abyan belongs, along with other security officials from the province.