Iran's regime has called a rally in Tehran on February 18 to express "hatred" against the opposition movement, as its two key leaders launched fresh anti-government tirades despite demands they be hanged.

The call for the mass rally came as clashes erupted between regime backers and "apparent" supporters of the opposition at a funeral attended by thousands in Tehran of a student killed in anti-government protests of Monday, AFP reported.

"The noble people of Tehran will take to Enghelab Square after Friday prayers with their solid and informed presence," the Islamic Propagation Coordination Council, which organizes regime-backed programs, said on February 16.

It said those joining the rally will "scream out their hatred, wrath and disgust against the savage crimes and evil movements of sedition leaders, their Monafeghin (hypocrites) and their monarchist allies."