BBC News - Syrian unrest: 'Heavy fighting' in Jisr al-ShughourSyrian government forces have advanced into the northern town of Jisr al-Shughour, state media say, as part of a widespread government crackdown.
TV reported heavy fighting with armed groups, two dead and large numbers of arrests, while witnesses reported an attack using tanks and helicopters.
The government says it is trying to restore order after 120 security personnel were killed last week.
Residents say they died after a mutiny and fighting between security forces.
The government advance sent more people fleeing towards the Turkish border, to join thousands who have already crossed.
BBC correspondents on the border say the number of those who have crossed is probably now much higher than the official figure of 4,300 given 24 hours ago. Witnesses said some 10,000 were sheltering in the area.