Tamarod, a rebellion campaign whose aim is to collect 15 million signatures on a petition against President Mohamed Mursi, said on Tuesday that the lawsuits against it show that the Muslim Brotherhood fears it. 

Egypt’s chief prosecutor has ordered the state security prosecution to begin an investigation in a lawsuit that accuses a satellite channel, some journalists and three Tamarod founders of encouraging the public to revolt against the elected regime. 

In a post on its official Facebook page, Tamarod directed a message to the president, saying that they are not scared and will not give up or surrender. 

"The people have put their faith in us and we will not let them down," the campaign said.

Tamarod announced last week that it has so far collected over two million signatures for a no confidence vote against Mursi and his Muslim Brotherhood government. 

Prominent opposition figures, including Amr Moussa, Hamdeen Sabahi and Mohamed ElBaradei, have announced their support for the campaign.