Singapore will fly its national flag at half-mast on the coming Sunday as a mark of respect for the victims of the recent tsunami disaster in the Indian Ocean region.

According to a statement by the Ministry of Community Development, Youth and Sports (MCYS) on Tuesday, Prime Minister Lee Hsien Loong will attend a memorial service, which will be heldo n Sunday to remember victims both in Singapore and across the world.

The statement said that Singapore stands in solidarity with all the countries that have been grievously affected by the disaster.

On Tuesday afternoon, the second helicopter landing ship, RSS Persistence, left Singapore for Sumatra's Meulaboh with medical and engineer teams of 196 personnel on board.

Carrying engineering equipment and transport vehicles as well as food and medical supplies, the dispatch is part of the second phase of Singapore's relief assistance to Indonesia.

The first helicopter landing ship, RSS Endurance, has arrived off Meulaboh with a medical team in an effort to set up a field hospital there.

Prime Minister Lee Hsien Loong and Defence Minister Teo Chee Hean also arrived in Medan of Indonesia earlier on Tuesday to see the damage caused by last week's earthquake and tsunami.

They will visit Banda Aceh and Meulaboh, which are among the worst-hit areas in the region.

As of 1 p.m. Tuesday, nine Singaporeans have been confirmed dead, 12 others missing and 30 still unable to be contacted.