ISIS terrorists have beheaded two women and a man whom they accused of "sorcery," Reuters said based on reports by the Syrian Observatory for Human Rights.

The incident marks the first time the terror group, which controls large swaths of territory across Syria and Iraq, has decapitated female civilians.

The beheadings took place this past week in Deir al-Zor and al-Mayadeen, two cities in Syria's eastern Deir al-Zor province, according to Rami Abdulrahman, who heads the observatory monitoring the country's civil war between ISIS, rebels and forces loyal to dictator Bashar al-Assad; the murdered man was the husband of one of the female victims, Abdulrahman detailed.

ISIS, which refers to itself as the "Islamic State" and has often made international headlines for its brutal killings of enemy combatants, aid workers and journalists, had previously stoned to death female captives accused of adultery and other offenses, Reuters noted. The individuals murdered this week were suspected of using "magic for medicine," according to Al Jazeera.

"It is the first time that the beheading of women, by the use of sword in public, has taken place in Syria," Abdulrahman emphasized in an interview with the Arab news network.

Meanwhile, ISIS also crucified five men in al-Mayadeen after accusing them of eating during daylight hours during the Muslim fasting month of Ramadan, the Syrian Observatory for Human Rights told Reuters. The victims were hung up by their limbs on the city wall, and ISIS encouraged children to mock the men, the group noted.

The watchdog group has documented 3,027 executions carried out by ISIS since the declaration of its "caliphate" about a year ago; those numbers include 1,787 civilians and 74 minors, Al Jazeera said.

More than half of those executed, in fact, were civilians, and more than half of those civilians were members of the Sunni Shaitat tribe, which revolted against the terror group south of Deir al-Zor in August 2014, the news network noted. ISIS is known to use public punishments to control the local population through coercion and fear, Reuters added.