An army Colonel was killed on Monday in Yemen's business capital Aden after a bomb was detonated in his car, a security source said.

Unidentified gunmen planted the bomb inside the car of Colonel Muti'a Al-Sayani that exploded after noon while he was on his way to the city of Al-Buraika, the source said, adding an investigation was underway.

Separately, a woman was killed and five other civilians injured when clashes between the army and the tribesmen in Al-Haima Al-Kharjyah on the outskirts of the capital Sana'a resumed earlier today.

The Manar military post shelled the prior day some villages in the district damaging homes and the tribesmen fought back, local sources said.

Fierce clashes have been taking place in the district and nearby areas such as Nehm, Arhab and others between the republican guard and the tribesmen forcing many families to flee.

In Al-Haima Al-Kharjya, the confrontations erupted after the people prevented the army from establishing a republic guard post in their area.