Saudi Arabia and Kuwait have arrested two members of the Egyptian Muslim Brotherhood at Cairo’s request for committing violence in Port Said before fleeing abroad, Egypt’s prosecutor’s office said on Wednesday.

The arrests are the first reported cases of Egypt’s Gulf allies detaining members of the radical group on its behalf.

“The public prosecutor’s office has received notification of the arrest of Akram Al-Shaer by Saudi Arabia and Mohamed Al-Qabouti by Kuwait,” the Egyptian statement said.

The men were accused of inciting the killing of citizens and of assembling mobs to break into a police station and destroying property in the city of Port Said in 2013, the statement said.

Egypt listed the Muslim Brotherhood as a terrorist organization in December, escalating a state crackdown on the group. Hundreds of its members and supporters have been killed and thousands more, including the movement’s leadership, are in jail.

Saudi Arabia declared the Muslim Brotherhood a terrorist organization last Friday.

According to sources, it has deployed secret agents to identify supporters of the group, especially in the education sector. The education minister has already warned teachers against holding sectarian discussions at schools, saying they would face tough punishment in accordance with the law.

According to a report published by a Makkah newspaper, two Jeddah streets are named after Syed Qutub and Yusuf Qaradawi, prominent Brotherhood leaders.

Abdul Aziz Al-Nahari, a member of the committee for street-naming, said the previous committee had designated those names.

Abdullah Fadaaq, another committee member, denied social media reports that he named the Qaradawi street. “Before accusing me, they should ascertain the date when the street was named,” he told the Arabic daily.