"We want the public to visit the Jaffna Municipal grounds on 12 and 13 of this month to identify the personal belongings of the victims," Ajith Rohana, Senior Superintendent of Police said.
A Russian-built Antonov 24-passenger plane owned by local company Lion Air had departed Jaffna's Palaly airport on September 29, 1998, heading for Colombo's Ratmalana airport.
It had disappeared off the radar 30 minutes after the take-off.
All 48 passengers and seven crew members, including two foreigners, were killed as the plane crashed into the seas.
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An arrested member of the LTTE had confessed to shooting the aircraft down on the orders of his leaders.
Several aircraft were shot down by the LTTE missile fire during the time.
All 48 passengers were Tamils.
This showed that the LTTE terrorism did not spare their own community, Rohana said.
The identification of the belongings by the relatives would help to establish the identity of the victims, which in turn would help the prosecution against the suspect held.