Egypt's President-Elect Mohamed Morsi. Photo: Wikimedia Commons.

The Muslim Brotherhood’s accusation on Monday that Israel’s Mossad was behind Sunday’s terror attack on a checkpoint in Sinai is “nonsense,” and even the accusers themselves do not believe what they are saying, Israeli Foreign Ministry spokesman Yigal Palmor said, according to Israel Hayom.

Egypt’s Muslim Brotherhood said on its website on Monday that the attack on Sunday, in which terrorists killed 16 Egyptian policemen and proceeded to breach the border with Israel, “can be attributed to Mossad” and was an attempt to harm the Egyptian revolution and topple Islamist President Mohammed Morsi.

The Egyptian military, however, said the perpetrators behind the Sinai attack had the help of Palestinian militants, saying “forces from the Gaza Strip” aided them by shelling the Egyptian-Israeli border crossing with mortars as the attack was taking place.

Israel dismissed all allegations of involvement in the attack.

“Even the person who says this when he looks at himself in the mirror does not believe the nonsense he is uttering,” Palmor said.