unidentified

Several airports across Europe have closed down in recent weeks because of unidentified drones.

The Boracay left Russia last month and was off the coast of Denmark when unidentified drones forced the temporary closure of several airports last week.

Last week, Italian Defence Minister Guido Crosetto condemned what he said was an overnight drone attack by unidentified perpetrators on the flotilla.

India has demanded "immediate action" against unidentified people who vandalised a statue of independence hero Mahatma Gandhi in London.

Romania passed new legislation earlier this month to increase the authority of airforce pilots to shoot down unidentified planes and drones.