Footage purportedly showing the continued shelling of Syrian towns and cities has been posted online by activists.
ITV News cannot independently verify the content of this footage.
General Sir Mike Jackson, former head of the British Army, told ITV News that the situation in Syria is "worse or at least as bad as Libya".
In response to Tony Blair's comment to ITV News that "all options should remain open" in Syria, he said:
There is nothing I would take exception to. A decision to do nothing is a decision and it is a course of action.
– General Sir Mike Jackson
Syria is worse or at least as bad as Libya was when Nato action was taken."
He added that having been in the decision-making position before, he is “not going to second guess the guy who is taking them now.”
Kofi Annan, UN envoy, said if President Bashar al-Assad is to meet the April 10 deadline of withdrawing troops from Syrian towns, all fighting must end by 6am local time on April 12.
Despite the Syrian government's acceptance of the joint special envoy's (Kofi Annan's) plan of initial proposals to resolve the crisis, the violence and assaults in civilian areas have not stopped.
– Ban Ki Moon, United Nations Secretary-General
The situation on the ground continues to deteriorate."
United Nations Secretary-General Ban Ki Moon said violence in Syria and assaults on civilian areas are continuing and the situation in worsening.