10 people have been killed after Syrian government forces fired mortar bombs at a village in the northern Idlib province, according to the Syrian Observatory for Human Rights.
The same group reports that rebels have killed at least 12 soldiers during fierce fighting outside a military base in the eastern province of Deir al-Zor. At least one civilian has also died.
The renewed fighting comes after UN chief Ban Ki-moon once again called for the fragile ceasefire to be respected.
New video filmed by a British TV network shows the devastation in Homs, Syria’s third largest city, caused by months of pounding by pro-government forces in an attempt to quell a popular uprising.
Despite the presence of UN observers in the country, gun battles still break out. Large swathes of the city are in ruins. Remaining residents are at the mercy of government snipers.
The head of the UN observer mission to Syria Major General Robert Mood says a further 50 monitors are expected to arrive by the end of the week.
Two observers from the advance team have been deployed to Idlib province. Three other pairs have been sent to the cities of Hama, Homs and Daraa province, south of the capital Damascus.