The deputy head of Egypt's Salafist Al-Watan Party, Yousri Hammad, has denounced calls for demonstrations 30 June aimed at removing Egyptian President Mohamed Morsi.

"Yes, we oppose the president on certain issues, and we demand reforms and political inclusion of all different factions. But we fully reject bringing him down using violence and destruction of the economy," Hammad said in a statement on Facebook Saturday.

He went on to warn that there would be no chance for another Islamist party to take over power if Morsi is forced to step down before the end of his term.

"Those who are surprised at the amount of dissent against Morsi seem to forget that 12 million Egyptians did not give him their votes," he added. "I say to those who think that removing Morsi would make way for the empowerment of another Islamist party: dream on," he continued, ostensibly addressing Islamist-oriented parties who have voiced growing opposition to the president, who hails from the Muslim Brotherhood.

Hammad was a leading figure in Egypt's El-Nour Party, the largest Salafist political bloc, before he resigned with a number of the party's senior figures over disagreements regarding the party's position on the president. The resigning members, who later co-founded the Salafist Al-Watan Party, were accused in the dispute of serving the interests of the president who hails from the Muslim Brotherhood over that of El-Nour Party.  

The anti-Morsi grassroots Rebel petition campaign was launched in May and has been endorsed by near all opposition parties and figures. It has the intention collecting 15 million signatures "withdrawing confidence" from Morsi, in order to force early presidential elections.

The campaign, which announced on 29 May that it had collected seven million signatures, has called for mass protests to coincide with Morsi's first anniversary in power. The campaign has accused the president's administration of "failing to implement policies to improve the life of ordinary people."

Leading Islamist figures from the Muslim Brotherhood, the group from which the president hails, as well as other Islamist groups have criticised the campaign and accused its members of infringing on popular will.

Morsi was elected last year in Egypt's first post-Mubarak presidential elections.