CAIRO — Thousands of supporters of Egypt's Muslim Brotherhood are demonstrating in a Cairo square, waving pictures of ousted president Mohammed Morsi.

They're chanting anti-military slogans, calling the army chief a traitor. He led the military's removal of Morsi from office last week.

The unseating of Morsi followed demonstrations by millions of Egyptians against his rule. It was a bitter blow to the Brotherhood, which won a string of ballots, including Morsi's election as president.

One speaker at the Friday demonstration pledged to stay on the streets until Morsi is reinstated.

"We are ready to stay for a month, two months, a year or even two years," ultraconservative Islamist Salafi cleric Safwat Hegazi told protesters.

This week more than 50 pro-Morsi protesters were killed in a clash with the military.