ALGIERS, Aug 18 (Reuters) - Algeria on Wednesday blamed devastating wildfires this month on two groups it recently designated as terrorist organisations, adding that one of them was backed by Morocco and Israel. The president"s office said police had arrested 22 people for starting the deadly fires, but said ultimate responsibility lay with the Islamist Rashad group and MAK, an autonomy movement for the mostly Amazigh-speaking Kabylie region. Algeria designated both groups as terrorist organisations this year. The presidency said on Wednesday that MAK "gets support and help from foreign parties, particularly Morocco and the Zionist entity", referring to Israel. Neither the Moroccan nor the Israeli foreign ministries were immediately available to comment on the accusation. Algeria and its most populous neighbour Morocco have had bad relations for decades, with Algiers backing the armed Polisario movement that seeks independence for Western Sahara, a territory Rabat sees as its own. Algeria does not recognise Israel, referring to it in official statements only as the Zionist entity. Israel said this month that it and Morocco would soon establish full diplomatic ties. Forest fires have ripped across North Africa this month but have been fiercest in Algeria, causing damage and casualties in several provinces especially in Tizi Ouzou in the Kabylie region, east of the capital Algiers. "Security services will continue efforts to arrest the rest of those involved ... and all those belonging to the two terrorist organisations," the presidency said after a meeting of the high security council. Last month Algeria recalled its ambassador to Rabat after a Moroccan diplomat in New York called for the Kabylie people to have a right of self determination. Morocco"s King Mohammed VI in a July speech called for better ties with Algeria and the opening of their long-closed borders. Rabat offered to send help to combat the fires but Algeria made no public response. Reporting by Hamid Ould Ahmed in Algiers and Ahmed El Jechtimi in Rabat, editing by Angus McDowall and Grant McCool Our Standards: The Thomson Reuters Trust Principles.