Cairo (Agencies): Rivaling the biggest crowds since their pro-democracy revolt began, tens of thousands of Egyptians on Friday packed Cairo's Tahrir Square, the hub of the 18-day revolt that toppled President Hosni Mubarak, to mark the fall of President Hosni Mubarak a week ago and to push their new military rulers to steer the country toward reform.

IN PICS: Freedom Mubarak

The groups, which had organised the uprising, called it the "Friday of Victory and Continuation," reflecting both their achievement in forcing 82-year-old Mubarak out and their concerns about the future.

On the day of prayers and celebrations, many flag-draped protesters played musical instruments at the Square, which wore a festive look and where a large number of children were also present.

About a quarter-million people marched in the biggest demonstrations of the revolt that began Jan. 25. Free from the threat of retaliation, Friday's rally rivaled the turnout for those events.

The Coalition of the Revolution Youth, an alliance of pro-democracy groups that helped launch the revolt, called on the gathering to "remember the martyrs of freedom and dignity
and justice," Al-Jazeera reported.

A monument to those killed in the uprising — the Health Ministry has said at least 365 civilians died — was erected in one area of the vast plaza. Many stopped before the monument, laying flowers on the ground or taking pictures of the pictures of those killed.

Pro-democracy activists also sought an investigation into the killings during the uprising, lifting of the decades-old emergency law and support for the pay strikes by workers
across the country.

"We are going to commemorate the martyrs and in doing so we are awaiting justice," Mohammed Waked, a protest organiser, was quoted as saying by the pan-Arabic satellite
channel.

"If those detained during the protests are not released, let alone the older political prisoners, it would be a bad sign," he said. "It would show the army is not sincere about
political reforms."

The coalition has vowed to maintain pressure to ensure the rest of its political demands are met, including the "immediate release of all detainees," it said in statement
posted on Facebook.

The situation in Egypt remains unsettled amid labour strikes and apprehensions that the military council running the country may not implement promised democratic reforms.