BANGKOK, May 31 (Xinhua) -- Police have detained six young men in Hat Yai district of Thailand's southern province Songkhla over suspicion that they were involved in the coordinated seven bombings which hit the southern business hub city last Sunday night, media here reported Thursday.

    According to the Thai News Agency, the six suspects, all young men from the insurgency-plagued southernmost provinces of Yala and Pattani neighboring Songkhla, were detained Wednesday night at a rented house in Hat Yai.

    Police laboratory technicians found explosive powder traces on the hands and fingernails of two of the suspects. All six were taken to the police office in Yala province for further questioning.

    Thursday morning, a police team led by Adul Saengsingkaew, assistant National Police Chief, searched for additional evidence at the house, finding electrical wire, traces of explosive powder, chemical substances and a clock timer.

    Seven coordinated bombs exploded almost simultaneously in Hat Yai after 9 p.m.(1400 GMT) Sunday night, killing one person, who died in hospital on Tuesday, and wounding 12 others.

    On Monday, four persons were killed and 26 persons wounded in a bombing at a fresh market in Songkhla's Saba Yoi district.

    Police investigation has yet to determine if the Saba Yoi market bombing is related to Sunday's Hat Yai bombings.

    Insurgent violence in Yala, Pattani and Narathiwat, Thailand's three southernmost provinces, have claimed more than 2,000 lives in the past three and a half years.