Jakarta - Six people were injured when a group of Muslims tried to close down an entertainment area in a town in Indonesia's Sumatra island over the weekend, police said Monday.

Students and anti-vice activists tried to shut down the area in Pangkalan Kerinci near Langgam before the Muslim fasting month of Ramadan, said a local police officer, Supardiansyah.

But employees and other men mobilized by the business owners counter-attacked the group last Saturday.

Supardiansyah said local police and civic leaders had managed to calm the two sides and the town was now quiet. No one was arrested but about 100 police had been sent to the town from Pekanbaru, the capital of Riau province.

Islamic groups across Indonesia, the world's largest Muslim-populated nation, have been putting pressure on authorities to close entertainment spots during Ramadan, which starts in Indonesia on Friday or Saturday.