Al-Nahda, the Tunisian Islamic movement, has called for the Egyptian Authorities to release the Muslim Brotherhood Supreme Guide, Mohamed Badie, who was arrested on Tuesday.
After his arrest, Egyptian prosecution ordered the detention of Badie for 15 days on charges of inciting violence and killing demonstrators.
In a statement posted on its Facebook page, Al-Nahda said that it is following "the dangerous on-going developments in Egypt since the military coup on the Egyptian revolution."
The movement added: "We strongly condemn the arrest of Dr Mohamed Badie… and put complete responsibility for his safety on the coup authority," demanding his immediate release along with all other political prisoners.
Al-Nahda renewed its support to the right of the Egyptian people to defend their "free will and revolution" and to refuse the military coup, "which returned the regime of the deposed Hosni Mubarak."
On efforts to help the Egyptians, Al-Nahda called for all Egyptian parties, as well as regional and international parties, "to take a clear position and to support the Egyptian people in the defence of their free will and return to the ballot box as the only way to end the bloody dispute."