Egypt's April 6 Youth Movement files charges of libel on Saturday against lawyer Mortada Mansour.
Mansour cited on Al-Tahrir TV channel State Security documents that show the movement's leading members Ahmed Maher, Esraa Abdel Fattah and Asmaa Mahfouz travelled to Israel in 2011. Anti-Israel sentiment runs high in Egypt, so a person travelling to Israel can easily be viewed as a social and political anathema.
The movement retorts that all Mansour's accusations are untrue and filed a case with the prosecutor-general against both Mansour and Ahmed Samir, the anchor that interviewed him.
Earlier on Saturday, the movement released a statement saying that it "totally opposes" recent suggestions by political activists to travel abroad to help shape international view of the ouster of president Morsi. They also assert that it is "strictly an internal affair;" a popular uprising - not a military coup.
On 3 July, the army deposed President Mohamed Morsi following massive nationwide demonstrations against him. The next day, Adly Mansour, head of the High Consitutional Court, was sworn in as interim president.
Mansour has been a controversial figure on the Egyptian political scene.
A former chairman of Cairo-based club Zamalek, he is known for his outspoken remarks that have landed him in trouble numerous times during the past few years.
He was heavily criticised by pro-democracy activists for launching a scathing attack against revolutionaries in the wake of the 18-day 2011 uprising that brought an end Hosni Mubarak’s 30-year autocratic rule.