Flights at Dubai International Airport were temporarily grounded on Friday morning due to suspected drone activity, an airport spokesperson said. The suspension was in effect from 10:13 to 10:45 a.m. local time (0613-0645 GMT) before flights were cleared to resume, Dubai Airport said. Service was now back to normal, the Dubai Media Office tweeted. Dubai airport, the hub for airlines Emirates and flydubai, is the world\u2019s busiest for international travellers. It served 81.4 million passengers in the first 11 months of 2018. There are severe penalties in the United Arab Emirates for unauthorised drone activity, General Civil Aviation Authority Director-General Saif Mohammed al-Suwaidi said in an interview with Al-Arabiya TV. Also read|\u00a0TRAI\u2019s new DTH, cable pricing rules: BARC holds back TV viewership data till further notice; check details The issue of drones interfering with commercial air traffic has taken on new urgency after reports of sightings around airports in Britain and the United States. In January, flights from London\u2019s Heathrow airport were halted for about an hour after a drone was sighted. Sightings also temporarily halted arrivals at Newark Liberty International Airport in New Jersey. Gatwick Airport, London\u2019s second busiest airport, was severely disrupted by drone sightings in December. Passengers at Dubai took to Twitter to complain about Friday's delay. "Stuck for ages at Dubai airport runway unable to taxi as unauthorized drones have entered the airspace here and all takeoffs have been grounded!" Twitter user @anushwij wrote.