Bahrain today criticised Qatar after the UAE accused fighter jets belonging to Doha of "intercepting" a passenger plane en route to Bahrain.
"Qatari fighter jets intercept an Emirati civilian aircraft during a routine flight to Manama in a flagrant threat to civil aviation safety and in a clear violation of international law," the UAE General Authority of Civil Aviation said in a statement published by the state news agency, Wam.
Bahrain's Foreign Ministry said the move was dangerous and risked innocent people's lives.
"The Foreign Ministry strongly condemns the interception by Qatar fighter aircraft of a civilian aircraft from the UAE to Bahrain during its normal flight this morning," it said in a tweet.
It said the move was in clear violation of relevant international conventions and laws, in particular those of the International Civil Aviation Organisation and provisions of the Chicago Convention on International Civil Aviation and its amendments of 1944.
"The ministry confirms that this hostile behaviour by Qatar against civil aircraft has become frequent in recent times and jeopardises the safety of civil aviation and carries a threat to the lives of civilians.
"The ministry reaffirms that Bahrain stands by the sisterly UAE and supports all measures it takes to maintain its security and stability and to stop these violations and to repel these violations by Qatar."
Four Arab nations - Saudi Arabia, Bahrain, the UAE and Egypt - cut all relations with Qatar in June, accusing it of ties to both Islamist extremists and Iran.