Two Indians and one Pakistani national have died and six more injured after a fire led to the explosion of three petroleum tankers near ADNOC's storage yard in Musaffah on Monday.
In a series of tweets, the national news agency WAM said the blaze has been brought under control.
Another "minor" fire was reported near a construction area of the Abu Dhabi International Airport.
Preliminary investigations have indicated that "small flying objects, possibly drones" caused the fires.
Authorities said "no significant damages" were caused and an extensive investigation is currently underway.
#شرطة_أبوظبي : الحادث أسفر عن وفاة شخص من الجنسية الباكستانية و شخصين من الجنسية الهندية و إصابة 6 آخرين إصاباتهم بين البسيطة و المتوسطة.#وام
— وكالة أنباء الإمارات (@wamnews) January 17, 2022
ADNOC later said in a Tweet that the incident at its Mussafah Fuel Depot occurred at around 10:00 am.
"ADNOC is deeply saddened to confirm that three colleagues have died. A further six colleagues were injured and received immediate specialist medical care," it added.
At approximately 10:00 AM this morning, an incident occurred at our Mussafah Fuel Depot in Abu Dhabi which resulted in the outbreak of a fire. ADNOC is deeply saddened to confirm that three colleagues have died.
— ADNOC Group (@ADNOCGroup) January 17, 2022
A further six colleagues were injured and received immediate specialist medical care. Professional support teams are supporting the families of all those who have been impacted.
— ADNOC Group (@ADNOCGroup) January 17, 2022