Wael Qubady, Associated Press
In this photo taken on Monday, Aug. 3, 2015, a tank belonging to fighters against Shiite rebels known as Houthis driving near a road leading to Al-Anad base near Aden in the southern province of Lahej, Yemen.

SANAA, Yemen — Yemeni security officials and anti-rebel fighters say a bomb inside a booby-trapped car at a key military base has killed 15 anti-rebel fighters and wounded more than 20.

The officials said Saturday the bomb was left by Shiite Houthi rebels before they were driven out of the Labouza military base.

The explosion happened late Friday, on the same day the pro-government forces retook Labouza, the last military base in the country's south that was held by the Houthis.

The officials spoke on condition of anonymity because they were not authorized to speak to journalists.