Israel struck a military position near an airport on the outskirts of Aleppo Sunday night. According to Syrian opposition source, 22 people were killed including nine Iranian nationals. Earlier, the Britain-based Syrian Observatory for Human Rights said nine Syrian soldiers were killed.

Six of those killed in the attack held Syrian citizenship. There is no information regarding the other 3 soldiers killed, the war monitor reported.

According to the report, the attack targeted a site near the Al-Nayrab airfield, causing damage. The report said there were no casualties.

"The Zionist enemy... targets one of our military sites north of Nairab airport, causing only material damage," said Syrian state news agency SANA, quoting a military source.

The war monitor said the attack targeted warehouses where weapons belonging to the Syrian army as well as to Iranian militias were kept.

It said the strikes were an attempt by Israel to support rebels in southern Syria, where Syrian government forces have been waging an offensive.

An Israeli military spokesman declined to comment on the report.

The Israeli military said Friday it shot down a drone approaching from Syria. This was the second time in a week that a drone had entered Israel from Syria; on Wednesday, the military shot down over Lake Kinneret 10 kilometers (6 miles) into Israel.

In response to Wednesday's drone incursion, the air force attacked three military positions in Syria that night, the Israel Defense Forces said.

Reuters contributed to this report