Israel's top court ruled unanimously on Tuesday that the state must draft ultra-Orthodox Jewish men into military service, potentially destabilizing Prime Minister Benjamin Netanyahu's ruling coalition.

The High Court of Justice's decision on the politically charged issue comes as calls grow for ultra-Orthodox men, historically exempt from mandatory service, to enlist as Israel wages war on Hamas in the Gaza Strip and prepares for potential fighting in Lebanon.

"The executive branch has no authority to order not to enforce the Security Service Law for yeshiva students in the absence of an appropriate legislative framework," the court said.