The Ruwais oil refinery, considered the largest single-site refinery in the Middle East and among the top four largest in the world, has been closed as part of precautionary measures following a drone attack, Bloomberg reported Tuesday.

Earlier in the day, authorities in Abu Dhabi said a fire broke out at a facility in the Ruwais industrial complex after a drone attack, with no injuries reported so far.

There was no immediate report on whether the refinery itself, situated in the complex, was hit.

The refinery reportedly has a refining capacity of about 922,000 barrels of crude oil and condensate per day.

The development came as the deadly regional conflict entered its 11th day. On February 28, Israel and the United States launched joint attacks on Tehran and several other Iranian cities, killing Iran's Supreme Leader Ali Khamenei, along with senior military commanders and civilians. Iran responded by launching waves of missile and drone strikes targeting Israeli and US assets in the Middle East.

On Tuesday, the United Arab Emirates' (UAE) Defense Ministry said its air defense systems have detected 262 ballistic missiles, 1,475 drones and eight cruise missiles since the start of what it described as Iranian attacks.

It said the air defense systems intercepted eight of the nine detected ballistic missiles and 26 of the 35 detected drones launched toward the country on Tuesday alone.

Six nationals of the UAE, Pakistan, Nepal and Bangladesh have been killed, and 122 residents of multiple nationalities have suffered moderate to minor injuries in the UAE amid the recent escalating regional tensions, said the UAE Defense Ministry.