WASHINGTON — President Bush lashed out at Syria yesterday, as the Bush administration outlined a three-part strategy to increase pressure on Syria to quickly pull its troops and intelligence services out of Lebanon.

Egypt and Saudi Arabia have joined the international effort behind the scenes and are trying to broker a timetable for Syria to withdraw its more than 14,000 troops in Lebanon, preferably within the next two months, U.S. and European officials said. The Arab diplomatic effort is an attempt to prevent the confrontation between Syria and other countries from escalating.

Syrian President Bashar Assad is expected to hold talks today in the Saudi capital of Riyadh to discuss the proposal and his plans, a State Department official said.

Bush warned yesterday that the world is now "speaking with one voice when it comes to making sure that democracy has a chance to flourish in Lebanon and throughout the Middle East."

The administration is raising its own voice publicly against Syria's three-decades-long domination of Lebanon in daily statements while sending stern diplomatic messages behind the scenes and making clear it is prepared to consider new sanctions against Syria.

Lebanon has rapidly become a centerpiece of the Bush administration's effort to promote democracy in the Middle East, as Syria has increasingly become the target of U.S. scorn and pressure.

Collaboration with European allies is the second part of the U.S. strategy. Bush, appearing yesterday at Anne Arundel (Md.) Community College, applauded a new joint U.S.-French effort that he said declared "loud and clear to Syria: You get your troops and your secret services out of Lebanon."

The third part of the U.S. strategy is working with Arab allies who have influence on Syria, said a senior State Department official returning from London yesterday with Secretary of State Condoleezza Rice.

Egypt, which accounts for more than half the Arab world's population, and oil-rich Saudi Arabia have particular clout in dealing with Syria, U.S. officials said.

"Syria listens to them in a way that is distinct from our bilateral relations or in dealing with Europe, so it's an important element," said a second senior U.S. official, speaking on the condition of anonymity because of the sensitive diplomacy.