Turkey has entered the war on the side of the Islamic State, the Vice President of the Italian Senate Roberto Calderoli said after a Russian Su-24 jet was downed over Syria with an air-to-air missile launched by a Turkish F-16 fighter, Sputnik News reports.

On Tuesday morning a Russian Su-24 fighter jet crashed in Syria with two people aboard. Ankara claims Turkish F-16s shot down the plane because it violated the country’s airspace. Contrary to Turkey’s accusations, Russian President Vladimir Putin said the aircraft was 0.6 miles away from Turkey when it was shot down.

“Turkey has officially entered the war on the side of ISIS by downing at the order of [President Recep Tayyip] Erdogan a Russian aircraft which has participated in operations against Islamic terrorists in Syria,” the leading member of the Northern League (Lega Nord) Party wrote on his Facebook page.

According to Calderoli, Turkey is a “’Trojan Horse’ with which assistance the Islamic fundamentalism would like to take a clear shot at the West.”

“Why is Turkey still in NATO after what happened? What else can be expected of the UN apart from taking a strong stand on ISIS and its allies?” Calderoli wondered.

The politician has also criticized Rome’s official stance.

“The Government [of Matteo Renzi] is on the wrong side with [German Chancellor Angela] Merkel, instead of taking the side of Putin in this war to defend our values, our freedom and our traditions,” Calderoli wrote.