The terror group, known as ISIS, killed seven men in central Syria and two men and a boy of unknown age in the north, the Syrian Observatory for Human Rights has said.
The monitoring group’s head Rami Abdel Rahman told AFP the executions were public but fighters then destroyed any cameras which had caught them on film.
This is the latest in a series of brutal executions of allegedly gay men by ISIS, who previously released a video throwing men off a roof in the Syrian town of Homs.
ISIS is a jihadist, extremist militant group fighting for a self-proclaimed Islamic State. It is designated a terrorist group by the UN and has been accused of multiple war crimes and human rights violations.
Two men from Iraq and Syria, who were targeted by the Islamic State for their sexual orientation, briefed the UN Security Council in August. It was the first time that LGBT issues were discussed by the Council in its 70 year history.
According to the Syrian Observatory for Human Rights, ISIS have executed more than 3,000 people, including at least 1,800 civilians, since it announced its caliphate in June 2014.
Words Max Ramsay