Police spokesperson Colonel Thembeka Mbele said a case of arson was being investigated by the Greenwood Park SAPS.
According to Mbele, a complainant said he had been asleep in the mosque when he heard windows shattering.
“He saw that there was a fire inside the mosque and managed to get out through the window. No injuries were reported,” Mbele said.
She added that at this stage it was believed that the suspects poured petrol into the mosque and set it alight. The motive is as yet unknown.