TEMPO.CO, Aden - Saudi-led coalition warplanes struck targets in Yemen’s Houthi-held capital Sanaa on Thursday, Dec. 31, in retaliation for attacks in the southern port city of Aden the previous day that took place as officials in a government-backed by Riyadh arrived there.

The coalition accused the Houthi movement, which it has been fighting for six years, of staging the attack on Aden’s airport and a second one on the presidential palace.

Thursday’s coalition airstrikes hit Sanaa airport and several other sites in and around the city, residents said. Loud blasts were heard and warplanes flew overhead for several hours, they said.

Houthi-run Masirah television said the planes hit at least 15 locations in different districts in the capital. There were no immediate reports of casualties.

Coalition airstrikes have killed thousands, including many civilians, over the course of the war.

But they have been less frequent in recent years as the conflict has reached a stalemate, with the Iran-aligned Houthis controlling most population centers and President Abd-Rabbu Mansour Hadi’s internationally recognized government - supported by Riyadh and Western powers - basing itself in Aden.

The main war has been eclipsed by a power-struggle between Hadi’s government and southern separatists in Aden. Saudi Arabia has been trying to unite them to focus on fighting the Houthis.

Read: 22 Killed in Attack on Yemen's Aden Airport after New Cabinet Lands

REUTERS