World Bulletin/News Desk

Four people were killed and five others injured on Tuesday in a suicide bombing that targeted an army checkpoint in Libya's eastern city of Ajdabiya, a military official has said. 

"The bomber drove an explosive-laden car into the checkpoint and detonated it, killing himself along with three army commandos," army commander Hamza Fakhri told The Anadolu Agency.

"Five troops were also injured," he added.

No group has claimed responsibility for the attack, which was the second such suicide bombing to target the checkpoint within three months.

Ajdabiya has been the site of several recent attacks targeting security officials and sites. The last such attack, which occurred two weeks ago, was on a local police headquarters.

Libya has been dogged by instability since the 2011 ouster and death of longstanding ruler Muammar Gaddafi.

In the more than three years since, rival militias have often locked horns, frequently bringing violence to Libya's main cities, including Benghazi and capital Tripoli.