Cairo protest aims to draw one million (VIDEO)

Protesters in Egypt have called for a massive demonstration in Cairo on Tuesday in a bid to force Hosni Mubarak to give up power.

The so-called April 6 Movement, aligned with leading opposition figure Mohamed ElBaradei, said it hoped to coax more than a million people onto the streets of the capital.

Several hundred demonstrators remained camped out in Tahrir Square in central Cairo overnight Sunday, defying a curfew that has been extended by the army.

Thousands were back on the square by midday on Monday, chanting anti-government slogans, as a heavy military presence was seen in many parts of the capital.

An Al Jazeera correspondent said the military's attempts to block access to the square on Monday by closing roads was not working, as more people were arriving in a steady stream.

"Protesters say they'll stay in this square for as long as Mubarak stays in power," the reporter said.

Protesters seem unmoved by Mubarak's pledge to institute economic and political reforms, with the sentiment on the street being that such pledges were "too little, too late," according to Al Jazeera.

Meanwhile, six Al Jazeera English journalists have reportedly been arrested in Egypt following a clampdown on the news network.