Egyptian President Hosni Mubarak is expected to step aside Thursday evening, the head of the country's ruling party said, finally conceding the main demand of protesters gathered in central Cairo 's Tahrir Square .

Hossam Badrawy, secretary-general of the National Democratic Party, says he told Mubarak in a phone call Thursday that the president needs to step down for the good of the country. Mubarak didn't say what he would do, Badrawy said, but he believes the president will step down.

"I have no definite information, but that is my expectation" that he will step aside," Badrawy said. "He is definitely planning to speak to the nation tonight."

(This story and related background material will be available on The Wall Street Journal Web site, WSJ.com).

The comments came as another huge crowd gathered in Tahrir and a military officer told those gathered that top military officials were meeting and planned to support the people's demands. State Television reported that the army was preparing to take control.

"I spoke to him as the head of the NDP," Badrawy said. "I told him this is for the good of the nation. This is the only way to restore confidence in
Egypt . This is the move that the republic needs."