Arab coalition warplanes struck a prison in the Yemeni city of Hodeidah, killing at least 33 people including inmates, a local official, relatives and medical sources in the Houthi-controlled Red Sea port said on Sunday.

The prison in the city’s al-Zaydiyah district was holding 84 prisoners when it was struck three times late on Saturday, the sources said.

Read: Widespread condemnation for Houthi attempt to strike Makkah

The Saudi-led coalition has been fighting Houthi rebels since March 2015 to try to restore to office internationally-recognised President Abd-Rabbu Mansour Hadi, who was sidelined from power by the Iranian-allied group in late 2014.