BEIRUT (AP) — Syrian government forces on Saturday captured another village near Aleppo, tightening the noose around rebel-held parts of the northern city, Syrian state TV and an opposition activist group said.

State TV and the Britain-based Syrian Observatory for Human Rights said troops captured Tamoura Saturday around noon, amid intense shelling and air raids by Russian warplanes.

Syrian troops have been advancing under cover of Russian airstrikes with the aim of besieging rebel-held parts of Aleppo, Syria's largest city. If they are able to do so, it will be the biggest defeat for insurgents since the conflict began in March 2011.

After capturing Tamoura, the troops still have to take several more villages and towns, including Hayan, Anadan, Hreitan and Kfar Hamra, in order to completely encircle the Aleppo rebels.

Hezbollah-run Al-Manar TV said troops are now overlooking the town of Hayan and parts of Anadan. The Lebanese militant group is fighting alongside forces loyal to Syrian President Bashar Assad.

Al-Manar later aired live footage from an area overlooking Anadan in which Syrian troops were heavily pounding the area with artillery shells and white smoke could be seen billowing from several spots on the open area. Al-Manar has a reporter embedded with Syrian troops in Aleppo province.

To the north, warplanes carried out more than 20 air raids on the town of Tel Rifaat, a stronghold of the powerful ultraconservative Ahrar al-Sham group, according to the Observatory and activist Amer Hassan who is currently in the nearby town of Azaz. Tel Rifaat is about 15 kilometers (9 miles) from the border with Turkey.

"Today is one of the worst days since the revolution began," said Hassan via Skype, adding that activists counted 46 air raids on Tel Rifaat alone Saturday. "We have not seen such intense air raids before."

He added that Tel Rifaat is one of the biggest strongholds for militants in Aleppo province adding that "if Tel Rifaat falls it means that all northern parts of Aleppo will follow."

Saturday's fighting came a day after the United States and Russia announced a plan to halt the violence within a week, but it's unclear whether fighters on the ground will adhere to it.

Also Saturday, an official with the rebel Army of Islam group that controls areas near Damascus said that they killed scores of soldiers on Feb. 7, when they ambushed an army force that was trying to infiltrate into Tel Soran near the Damascus suburb of Douma.

The Observatory said last Sunday's attack killed 76 government troops adding that 45 were killed in the ambush and another 31 died after entering a mine field.

Syria's five-year war has killed 250,000 people, wounded more than a million and displaced half the country's population.