Israel has formally ended a decades-old cooperation agreement with the United Nations Palestinian relief agency (UNRWA) that covered the protection, movement and diplomatic immunity of the agency in Israel, the West Bank and the Gaza Strip.

Israel notified the U.N. in a letter on Sunday, as required by a new law adopted by Israel's parliament that will ban UNRWA's operations in Israel and prevent Israeli officials from cooperating with it when the law takes effect in late January.

The end of the 1967 agreement, however, is immediate. U.N. lawyers are studying the letter, U.N. spokesperson Stephane Dujarric told reporters on Monday, adding that: "UNRWA is continuing to operate today."