2125 GMT: Before he left Washington, Prime Minister Saad Hariri got his meeting with President Obama and Washington's supportive words.
Obama and Hariri urged all parties to refrain from causing further instability, and the White House said:
The efforts by the Hezbollah-led coalition to collapse the Lebanese government only demonstrate their own fear and determination to block the government's ability to conduct its business and advance the aspirations of all of the Lebanese people.
Obama also stressed the importance of the UN Special Tribunal on Lebanon "to help end the era of political assassinations with impunity" in the country.
1810 GMT: Prime Minister Hariri has cut short his trip to the US and is returning homes. There are reports that he will stop in Paris for a discussion with French President Nicolas Sarkozy.