RABAT, Sept 22 (Reuters) - Morocco's designated primeminister, Aziz Akhannouch, said on Wednesday the three biggestwinners of this month's parliamentary election, the liberal RNIand PAM parties and the conservative Istiqlal, had agreed toform a new cabinet.

King Mohammed on Sept. 10 designated Akhannouch, the leaderof RNI, to form a new government after his party came first inthe election, taking 102 of the 395 seats in parliament.

(Reporting by Ahmed Eljechtimi, writing by Angus McDowall;Editing by Kevin Liffey) ((angus.mcdowall@thomsonreuters.com; Reuters Messaging:angus.mcdowall.thomsonreuters.com@reuters.net))