JAKARTA, Jan. 3 (Xinhuanet) -- The bomb exploded at a market on last Saturday morning in Indonesia's province of Central Sulawesi that claimed seven fatalities was wrapped with the head of a mortar round and ball bearings, police said here Tuesday.

    National Police deputy spokesman Sr. Commissioner Anton Bahrul Alam told a press conference here that traces of potassium chlorate, aluminum and sulfur were also found at the bomb site, a market stall which sold pork in the provincial capital of Palu.

    "The bomb was packed with mortar and contains ball bearings," he said at the police headquarters here.

    Anton said that the container was made of metal pieces but the police had not identified yet the trigger of the bomb.

    "The bomb also contain nails," he said.

    Anton said that the police still investigate a 37-year-old man who was detained the same day of the bombing.

    Indonesia is the world's largest Muslim-populated nation, with 87 percent of its 220 millions population are Muslim. But the composition of Christians and Muslims in the parts of Sulawesi andin the Malukus is equal.

    Thousands of people were killed during the sectarian clashes between Muslim and Christian in Maluku and part of Sulawesi from 1999 to 2002. Enditem