Bangkok: An army spokesman says suspected Muslim insurgents detonated a bomb at an open-air market in insurgency-wracked southern Thailand.

Army spokesman Col. Parinya Chaidilok says the homemade explosive was hidden in a motorcycle parked in front of the fresh market in downtown Yala.

He says it went off on Monday morning as civilians were shopping and that three soldiers were also wounded in the attack.

More than 3,700 people have been killed in Thailand's three southernmost provinces - Narathiwat, Pattani and Yala - since an Islamist insurgency flared in January 2004.

The provinces are the only Muslim-majority areas in the predominantly Buddhist country.

Muslims in the region have long complained of discrimination by the central government.