Opposition fighters enter Sheikh Suleiman base near city of Aleppo after weeks of fighting, Syrian Observatory says.
Syrian rebels have captured parts of a large army base in the country's north, just west of the city of Aleppo, activists say.
The Britain-based Syrian Observatory for Human Rights said the rebels entered the sprawling Sheikh Suleiman base on Sunday afternoon, after weeks of fighting.
The development indicates the rebels are strengthening their grip on northern areas near the Turkish border. Last month, they captured another large base near Aleppo.
Amateur videos released by activists showed fighters walking inside the base. The footage also shows rebels driving around in a captured tank and manning heavy anti-aircraft machine guns.
Damascus air raids
Meanwhile, the Syrian military carried out an air strike on suburbs of Damascus, the capital, as rebels clashed on the ground with soldiers on Monday, the Observatory said.
In-depth coverage of escalating violence across Syria
"A fighter bomber carried out a raid on Daraya as rebels and soldiers fought on the ground, while artillery bombed Moadamiyet al-Sham," it said, referring to two towns south of Damascus.
The air force also overflew Eastern Ghouta, an area where rebels have set up rear bases amid its orchards, the Observatory said.
The military has for several days bombarded rebel strongholds in the suburbs from ground and air, raising fears of a looming ground assault by the army to try to establish a secure cordon around the capital.