Search-and-rescue teams continued Sunday their hunt for the missing Adam Air plane's black box to unravel the mystery of its disappearance, Indonesia's Elshinta radio station reported.

The radio reported that the radius of the search for black box would be widened to 10 kilometers from Mallusetasi beach, South Sulawesi province as hope for finding survivors is slim.

An information technology expert Roy Suryo said the black box should be found to avoid further speculation over the cause of the missing airplane.

Experts have speculated that the airplane exploded in the air, thus its wreckage scattered in sea, beach and land.

But a relevant air transportation authority and the police have said they had checked the baggage manifest and did not find any dangerous materials brought by passengers in the plane.

So far the search teams have collected up to 153 objects associated with aircraft from waters off Pare Pare, Barru and Pangkep districts in South Sulawesi province.

The plane was on a flight from Surabaya in East Java to Manado in North Sulawesi with 102 people on board when it went missing on January 1.

Source: Xinhua