CAIRO (AFP) - Egypt's Prime Minister Hazem al-Beblawi vowed on Wednesday that Islamist protest camps in Cairo will be dispersed, after the presidency announced the failure of foreign mediation with ousted president Mohamed Mursi's supporters.

"There will be no going back on dispersing the Rabaa and Nahda sit-ins," state television quoted him as saying of two Cairo protest camps set up after the army ousted Mr Mursi on July 3.

"We did not disperse the sit-ins till now out of respect for the sanctity of the month of Ramadan," he added, referring to the holy Muslim fasting month that ends on Wednesday night in Egypt.