Egypt has called on Arab states to blacklist the Muslim Brotherhood as a terrorist organization as Saudi Arabia has done the same.

The move on Friday came after Saudi Arabia formally labeled Brotherhood a terrorist group.

“We welcome the Saudi decision... which shows the depth of cooperation and solidarity between the two countries,” said Egypt Foreign Ministry spokesman Badr Abdelatty.

“We look forward to see other countries which signed the 1998 Arab League counter-terrorism treaty follow the Saudi path and respect their commitments under the treaty,” the Egyptian foreign ministry spokesman added.

Egyptian sources say the treaty has been ratified by 18 of the Arab League’s 22 member states.

Egypt has accused the Muslim Brotherhood of being responsible for a deadly bombing last December that left at least 15 people dead. The Brotherhood has condemned the attack and denied involvement in the incident.

The Brotherhood has also reacted to the decision by Saudi Arabia by saying it was “surprised” and “pained.”

“History has always shown that the Brotherhood has been a leader in spreading true Islamic thinking... without extremism, as many of the kingdom’s scholars and leaders can testify,” a statement by the group said.

Cairo banned the Muslim Brotherhood last December.

On July 3, 2013, the army ousted Muslim Brotherhood-backed president, Mohamed Morsi, naming head of the Supreme Constitutional Court, Adly Mahmoud Mansour, as the interim president.

Following Morsi’s ouster, the army-backed government launched a deadly crackdown on the Muslim Brotherhood and its supporters.