The UAE has strongly condemned renewed Iranian attacks on the country, saying they represented a "dangerous escalation" and reserved the right to respond.
The Ministry of Defence said air defence systems had engaged 12 ballistic missiles, three cruise missiles and four drones, all launched from Iran on Monday.
Three people were injured in a fire at Fujairah Oil Industry Zone after a drone attack. They were all Indian citizens and were taken to hospital for treatment, the Fujairah Media Office said.
The UAE's Ministry of Foreign Affairs said the attacks were an "unacceptable transgression" and violated international law and the UN Charter.
The ministry said the UAE would not compromise on protecting its security, sovereignty and its people under any circumstances, and it reserved its full and legitimate right to respond to the attacks.
The UAE said it held Iran fully responsible for what it described as treacherous attacks and emphasised the need for an immediate halt to hostilities.
Flights resume after disruption
Flights to and from airports in Dubai and Abu Dhabi were operating largely as normal on Tuesday morning following disruption and diversions a day earlier.
There were only a few delays and cancellations. Dubai's live tracker showed that the delays and cancellations included flights to and from Bahrain and several airports in Iraq.
In Sharjah, inbound overnight flights landed as normal, and early-morning services appeared to have taken off on time, the live board showed.
FlightRadar24 said a number of flights were diverted to Muscat during the attacks on Monday, while others landed safely in Dubai and Sharjah after circling over Al Ain and Oman.
Wave of missile alerts
UAE authorities on Monday issued a series of missile alerts in Dubai, Sharjah and Abu Dhabi, urging residents to seek shelter.
The Ministry of Interior and the National Emergency Crisis and Disaster Management Authority said, in a series of messages sent from 5pm onwards, that the country was responding to missile threats.
"Air defence systems are currently responding to a missile threat. Please remain in a safe location and follow official channels for warnings and updates," Ncema said.
Residents reported hearing loud blasts in Dubai and Sharjah during the evening. Authorities said the sounds heard were the result of successful interceptions.
It marks the first time such alerts have been issued since the early hours of a conditional ceasefire agreed between the US and Iran on April 8.
The Emirates faced a daily barrage of missile and drone strikes from Iran following the outbreak of the war on February 28.
The renewed attacks follow the start of a US operation to allow commercial vessels stranded in the Gulf to pass through the Strait of Hormuz under American military protection.
There were reports of attacks on several vessels in the area on Monday, including a ship affiliated with Adnoc as it travelled through the strait.
Two drones targeted the ship, but no injuries were reported, the UAE's Foreign Ministry said.
The ministry accused Iran of a "terrorist attack" and expressed its "utmost condemnation and denunciation", calling it a flagrant violation of UN Security Council Resolution 2817 on freedom of maritime navigation.
"Targeting commercial navigation and using the Strait of Hormuz as a tool of pressure or economic blackmail constitutes acts of piracy by the Iranian [Islamic] Revolutionary Guard [Corps] and poses a direct threat to the stability of the region and its people and to global energy security," it said.
The UAE called on Iran to stop the "treacherous attacks" and commit to reopening the strait unconditionally.
Meanwhile, the UK Maritime Trade Operations said it had received a report of an incident involving a cargo vessel about 66km north of Dubai.
In an advisory, UKMTO said the vessel reported a fire in its engine room, and the cause was not immediately known.
All crew members were reported to be safe and accounted for, it added, noting that authorities were investigating the incident.
