UK firms have been granted licences to export bulletproof cars to Syria, MPs have been told.
A licence for armoured 4x4s was among the export permits which remain open despite President Bashar Assad's brutal repression of opposition in the country.
A spokeswoman for the Department for Business, Innovation and Skills said the UK had one of the world's toughest arms control regimes and there was no evidence UK-supplied equipment had been used to crush protests in Syria.
US Secretary of State Hillary Clinton says America will judge President Assad on his actions, not his words, and has called for an immediate end to attacks by the Syrian Government.
Her comments come as it is announced Syria has accepted the UN-Arab League peace plan amid reports that shelling is continuing in Homs.
Amateur footage has emerged from Homs, Syria apparently showing continued shelling in the city. The footage comes as Syria says it has accepted the UN-Arab League peace plan for the country.
ITV News is unable to independently verify the time or location of the footage.
Following talks with the foreign minister of Bosnia Herzegovnia, William Hague was asked about the latest diplomatic developments in Syria.
Mr Hague said he would be watching developments in the country with a "skeptical eye" and only actions would convince him the Assad regime was committed to peace.
The UN's Middle East envoy has told the UN Security Council more than 9,000 civilians have died in the conflict in Syria.
Syrian President Bashar al-Assad has toured the Babr Amr neighbourhood of Homs, a site of fierce fighting between the Syrian army and the rebels.
"Now the state has become involved and security has returned, we all need to work on reconstruction so Baba Amr can be a lot better than it was used to be before," he tells locals.
The Syrian government has written to Kofi Annan to accept his six-point plan, endorsed by the United Nations Security Council.
"Mr Annan views this as an important initial step that could bring an end to the violence and the bloodshed," said a spokesman for the joint special envoy.
– Ahmad Fawzi, Spokesman for the Joint Special Envoy
Mr Annan has stressed that implementation will be key, not only for the Syrian people, who are caught in the middle of this tragedy, but also for the region and the international community as a whole. As the Syrian government acts on its commitments, Mr Annan will move urgently to work with all parties to secure implementation of the plan at all levels.
Kofi Annan says his six-point plan, accepted by Syria, will deal with:
Accommodating political discussions in Syria;
Withdrawal of heavy weapons and troops from population centres;
Allowing humanitarian assistance into affected areas;
Freedom of movement;
Access for journalists.