An Emirati fighter jet taking part in a combat mission against Yemen has gone missing, the United Arab Emirates said Monday.

An Emirati fighter jet taking part in a combat mission against Yemen has gone missing, the United Arab Emirates said Monday.

"The Supreme Command of the Armed Forces announced today that a fighter jet taking part in the Arab coalition led by Saudi Arabia... in Yemen was missing," said a statement on the official WAM news agency.

It is the first known case of an Emirati jet from the coalition going missing since the Saudi-led campaign began in March last year.

Security officials and witnesses told AFP that a jet had crashed into a nearby mountain nearby Yemen's second city Aden on Monday as coalition warplanes operated in the vicinity after clashes erupted between Yemeni forces and Takfiris.