Intense fighting between insurgents and Syrian troops has continued in the country's centre amid new territorial gains for the government backed by Russian airstrikes.

The fighting was on multiple fronts in the northern part of the central province of Hama and southern Idlib, a rebel-controlled province.

A Syrian military official said his troops took over Tak Sukayk, a village in the northern part of the rural province of Hama, bordering the north-western province of Idlib.

The new territorial gain, following the government control of the nearby village of Atshan, came days after the government launched a wide-ranging ground offensive. That offensive was made possible by Russian airstrikes that began September 30.

The fighting is concentrated in Hama and the northern Idlib provinces, where a consortium of mainstream rebels as well as al Qaida's branch in Syria, the Nusra Front, are operating.

The Britain-based Syrian Observatory for Human Rights, a monitoring group that relies on a network of activists on the ground, said the rebels advanced on a hill overlooking Atshan overnight. The group said the rebels shelled government troops in the newly seized villages.