Three people were killed in an alleged Israeli strike on a pro-regime miliita in Syria on Sunday.

A statement by the militia, the Syrian National Defense Forces, said the casualties of the attack near the border town of Quneitra were soldiers. The militia fights along the Syrian army in support of President Bashar Assad.

The Syrian Observatory for Human Rights, a Britain-based war monitoring group, also said an attack had taken place, but said it remained unclear if the source of the bombardment was an air strike or shelling.

Lebanese outlet Al Mayadeen reported that two were also wounded in the attack.

The Israeli army refused to address the reports.

Rebel groups fighting President Bashar Assad's government in the Syrian conflict hold swathes of Quneitra, while the army and pro-government forces control another part of the province.

On Friday, the Israeli army attacked militant positions in the Syrian Golan Heights after three mortar shells exploded on the Israeli side of the border. The Israeli army said it was likely that the fire was not intentional, but was spillover from the Syrian civil war.

Mid-March saw an unusual exchange of fire between Israel and Syria, when the Israeli air force attacked several targets across the border and Syrian air defense launched several anti-aircraft rockets in response. One of the rockets entered Israeli airspace and was shot down by an Arrow missile. Following the incident, Israel made a rare statement admitting to the airstrikes in Syria.