CAIRO (Reuters) - Mohamed Badie, the top leader of Egypt's Muslim Brotherhood, has suffered a heart attack while in jail, the state run al-Ahram newspaper said on Saturday.

State-run news agency Mena denied a report by the private al-Nahar website, citing security sources, that Badie had died.

Many of the Brotherhood's leaders were imprisoned in recent weeks, in the toughest crackdown the group has faced.