Britain, the United States and Turkey were on Wednesday formally asked to arrest senior officials from the United Arab Emirates on suspicion of carrying out war crimes and torture in Yemen, three sources told Reuters.

British law firm Stoke White filed the complaints to Britain's Metropolitan police, the U.S. Justice Department and the Turkish Ministry of Justice on behalf of Abdullah Suliman Abdullah Daubalah, a journalist, and Salah Muslem Salem, whose brother was killed in Yemen.

The complaint, filed on Wednesday, says the UAE and its mercenaries were responsible for torture and war crimes against civilians in Yemen in 2015 and 2019.

A spokeswoman for the UAE could not be reached for immediate comment.

"It is requested that the U.K., U.S. and Turkish police open investigations into these alleged crimes as soon as possible," according to one of the sources.

The suspects identified include political and military leaders from the UAE who reside in the UAE and the U.S. but who travel to Britain regularly. The UAE is a leading partner in a Saudi-led coalition that intervened in Yemen in March 2015 to restore ousted President Abed Rabbo Mansour Hadi's government after it was toppled by the Houthis in late 2014. In July, the UAE said it was withdrawing its troops from Yemen but remained a part of the coalition.