Egyptian riot police on Tuesday fired tear gas outside the presidential palace as tens of thousands of protesters marched against President Mohamed Morsi.

Police tried to stop the crowd from storming the palace where Mr. Morsi was inside conducting business. The police soon retreated and let the marchers through a barrier and up to the palace walls.

Many of the marchers chanted the same anti-government slogans used in the uprising that toppled former authoritarian president Hosni Mubarak.

Protest leaders called Tuesday's march a last warning to Mr. Morsi to back down from his decree giving himself nearly unlimited powers and placing himself above the judiciary. They also are marching against a draft constitution that the opposition says was drawn up by Islamists, without input from secularists and liberals.

A referendum on the constitution is set for December 15.

Also Tuesday, 11 Egyptian newspapers suspended publication to protest the draft constitution. Journalists say it puts restrictions on free speech.