Cairo: An unknown terrorist group has claimed a deadly October 20 ambush that killed at least 16 Egyptian policemen in a statement published Friday on militant Islamist social media channels.

The statement purporting to be from a group called Ansar Al Islam - or “Supporters of Islam” - also said one of its leaders, Emad Al Din Abdul Hamid, was killed in Egyptian air strikes after the ambush.

The statement could not be independently verified.

No other group has claimed responsibility for the attack on police last month that saw assailants gun down officers in a shootout between Cairo and the Bahariya oasis in the Western Desert, a rare flare-up outside Egypt’s Sinai Peninsula.

The military said on October 31 and November 1 that it had tracked and killed all the attackers in desert raids and liberated a police officer taken hostage during the ambush.

Egyptian police have for years been seeking a militant named Emad Al Din Abdul Hamid, a former military officer turned terrorist.

He is believed to have joined a fellow officer, Hisham Al Ashmawy, in Libya following the 2013 military ouster of Islamist president Mohammad Mursi.

Ashmawy, who split with an Egyptian terrorist group that claimed allegiance to Daesh in 2014, is thought to be aligned with Al Qaida.

Egypt believes the militants have been plotting attacks from the terrorist stronghold of Derna in Libya.

Since Egypt’s army removed Mursi from power in 2013, extremist groups have increased their attacks on the military and police.

Authorities are fighting against the Egyptian branch of Daesh in the north of the Sinai peninsula, over 500 kilometres away from the scene of the October ambush.