Witnesses say attack helicopters from a Saudi-led coalition struck al-Qaida militants in southern Yemen, where the group has exploited the conflict between Shiite Houthi rebels and government forces to expand.

The Apache strikes in the town of Koud in Abyan province on Wednesday killed at least 10 militants and wounded others, witnesses said, speaking on condition of anonymity for fear of reprisals. It is one of the few times the coalition has been directly involved in battling al-Qaida.

Warring parties in Yemen have agreed on an open-ended ceasefire that began Sunday. Peace talks scheduled to take place next week.

Both sides reported violations to the truce, particularly in the city of Taiz, which the rebels have besieged for nearly a year, and in the outskirts of Sanaa.