Security officials say authorities have shut down all roads and public transportation to Cairo, where tens of thousands of people are converging to demand the ouster of Egyptian President Hosni Mubarak after nearly 30 years in power.

All intercity highways are blocked and all roads leading to Cairo have been closed. They say train services nationwide are suspended for a second day and all bus services between cities are halted.

The officials are speaking on condition of anonymity because they are not authorized to speak to the media.

Organizers hope a million will turn out in Tahrir, or Liberation, Square to force out a man they blame for ignoring the needs of the poor and allowing corruption and official abuse to run rampant.

THIS IS A BREAKING NEWS UPDATE. Check back soon for further information. AP's earlier story is below.

CAIRO (AP) _ Thousands of people are converging on the heart of Cairo to demand the ouster of President Hosni Mubarak after nearly 30 years in power.

Organizers hope a million will turn out in Tahrir, or Liberation, Square to force out a man they blame for ignoring the needs of the poor and allowing corruption and official abuse to run rampant.

Mubarak would be the second Arab leader pushed from office by a popular uprising in the history of the modern Middle East.

It's a day to the week after an extraordinary eruption of discontent and demands for democracy in the United States' most important Arab ally. The uprising is fueled by years of frustration with Mubarak's autocratic regime and emboldened by an uprising last month that overthrew Tunisia's president.