(CNN) -

ISIS militants in Syria reportedly crucified nine men in Aleppo province recently, the Syrian Observatory For Human Rights announced Sunday.

A statement from the London-based group said eight of the men were hung in the public center of Deir Hafer for three days. The men were charged with joining "Awakening" movements in the city, the organization said.

Another man was "crucified alive for eight hours" in al-Bab. The report didn't specify if the man was killed.

Typically the men ISIS crucifies are shot in the head first, then hung for public viewing with their arms tied to a horizontal beam.

CNN could not independently verify the reports.