Syrian President Bashar al-Assad is to address the nation on Monday as his forces sweep through the north-western border region.
Syrian forces swept through a north-western border region on Sunday to stem an exodus of refugees to Turkey.
Syrian forces shot dead 19 people on Friday when they fired at demonstrators demanding the removal of President Bashar al-Assad.
Thousands of Syrians have fled to escape the military campaign to crush anti-government protests, while all oil production in Syria has stopped.
Syrians fled a restive town towards the Turkish border, fearing bloodshed as troops with tanks approached.
Syrian security forces shot dead at least 30 demonstrators on Friday during protests that broke out across the country.
Syrian tanks shelled residential areas in two towns and at least 19 people were killed across the country, rights campaigners said.
Tanks stormed the mostly Sunni Muslim city of Banias on Saturday, a rights campaigner said, raising sectarian tension in a country swept by protests.
The US, reacting to the killing of 27 protesters by Syrian security forces on Friday, threatened to take new steps against the Syrian government.
Security forces on Monday rounded up hundreds of pro-democracy sympathisers, including prominent human rights campaigner Diana Jawabra.