DUBAI, UNITED ARAB EMIRATES – The Iranian-aligned Houthi movement in Yemen said it had attacked a Saudi Aramco refinery in Riyadh on Wednesday using a drone, but the oil company said a limited fire at the plant was due to "an operational incident. "Our drone air forces have targeted the refinery of ARAMCO company in Riyadh," read a tweet on the account of the Houthi-run television channel al-Masirah. "The operation by the drone air force is a strong start in a new stage of deterring the aggression," it quoted a Houthi military spokesman as saying in a tweet. Saudi officials were not immediately available for comment. Just before al-Masirah's tweet, Aramco announced that its fire control teams and the Saudi civil defenses had contained a minor fire that erupted in the early evening in a storage containers at its refinery in Riyadh.