World Bulletin/News Desk

Al Qaeda in the Arabian Peninsula (AQAP) said it had executed four men accused of planting electronic chips in vehicles to help U.S. drones track fighters in Yemen, in a video posted on a Yemeni news website.

The 28-minute video showed what AQAP said were four spies confessing that they had planted devices in vehicles which resulted in the deaths of AQAP fighters two years ago in the southern Shabwa province. It said the men were later executed.

A man identified as AQAP security official Abu Islam al-Muhajir said the group had uncovered "several spies who give them (drones) direction on the ground by putting chips in the cars of the mujahideen (fighters)".

The authenticity of the video could not be immediately verified.

Yemen is the main stronghold of AQAP. The United States acknowledges using drones in Yemen but does not comment publicly on the practice.

In April, a series of drone strikes killed about 65 fighters in southern and central provinces. Yemen's army followed up with an air and ground offensive to dislodge AQAP fighters from their main strongholds in the south.

The group has mounted dozens of attacks on government officials and security forces.

The group has alarmed neighbouring oil power Saudi Arabia and Western countries who fear al Qaeda could use Yemen as a springboard to launch international attacks.