The Houthi Group, Ansar Allah, denied its responsibility for a powerful explosion which rocked the Aden Refinery in the district of Al-Buraiqah in Yemen's southern city of Aden on Friday evening.
Head of the Houthi supreme revolutionary committee Mohammed Ali Al-Houthi accused the Saudi-led Arab coalition which has been fighting in Yemen since 2015 of being behind the attack on the refinery.
He tweeted: "The army, the security forces and the popular committees are fighting invasion and occupation. They don't put vital civilian institutions of Yemen on their lists like the US-Saudi-UAE aggressors and their allies have been doing".
"We hold the occupiers and their elements responsible for burning the refinery and consider this act as an attack on the sons of Aden and the refinery's staff".
Fire broke out at one of the refinery's tanks containing residues of petroleum derivatives after the explosion. It was brought under control immediately.
The refinery's leadership said in a statement it has not identified the cause of the explosion and that it suggests it was an act of sabotage.