(CNN) -- Gunmen believed to be linked to an Islamic militant group opened fire Monday in a mosque in Thailand, killing 10 people, a police official said.
Another 12 people were wounded, according to Peerapol Na Pattalung, chief of Joh I-Rong police station in Narathiwat province, southern Thailand. The wounded were sent to hospital.
Worshippers were holding evening prayers at Unpurakorn Mosque when the shooting took place about 7:50 p.m. (8:50 a.m. ET), the police chief said.
The region has faced increasing violence stemming from the activities of Islamic separatists.
CNN's Kocha Olarn in Bangkok contributed to this report
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