Syrian state television says government troops are fighting violent battles with what it says are “armed gangs” in Jisr Al-Shughur. Witnesses in the northern flashpoint town have reported attacks by helicopters and tanks.
The government advance has sent thousands of people across the border into neighbouring Turkey.
British Foreign Minister William Hague has urged the UN to send a “clear message” to the Syrian government by issuing a resolution condemning its crackdown.
But Hague says the resolution is resting on a “knife edge”. Britain, France, Germany and Portugal drafted it but it has become bogged down in talks with the other 15 members of the Security Council.
24 hours ago, an estimated 4000 people were said to have crossed the border.
Officials now say that number is likely to be much higher.
This is now a humanitarian crisis according to the US, which is calling for the International Red Cross to be given access.