According to Artsakh defense army, Azeri forces also used a 60-mm mortar in the northeastern section of the frontline.

Rex Tillerson issued instructions to implement Trump's order in a series of four cables to consular officers worldwide last month.

State comptroller Manuel Galindo imposed a "sanction of disqualification from exercising public office for a period of 15 years."

It was not clear why the government had withdrawn the summons, or whether it had closed an investigation it said it was conducting.

The Syrian Observatory for Human Rights said the aircraft "took off from inside the Shayrat base, which is partially back in service."