Prime Minister Benjamin Netanyahu on Sunday embarked on what he termed a "final effort" to break a deadlock on forming a governing coalition ahead of a Wednesday deadline for a deal.

In power for the past decade, Netanyahu has unexpectedly struggled to seal an agreement with a clutch of right-wing, far-right and ultra-Orthodox Jewish parties that would align with his Likud party and ensure him a fifth term following Israel's April 9 election.

Divisions between former Defense Minister Avigdor Lieberman's ultranationalist Yisrael Beitenu party and United Torah Judaism over a military conscription bill governing exemptions for ultra-Orthodox Jewish seminary students have plunged the coalition talks into stalemate.