"As we have seen, disaster zones are not always the same as forecast [by the Indonesian National Board for Disaster Management]. This is why coastal regions that were hit by the tsunami were not ready for it. A new tsunami is probable, and the population and [related] agencies of the coastal regions should be ready for it. We should avoid the emergence of new victims", Widodo said, as quoted by the Detik News website.
The number people, who were killed as a result of the tsunami has risen to at least 373, according to Sutopo Purwo Nugroho, a spokesman for Indonesia's disaster mitigation agency.
"1,459 people are injured, while 128 remain missing," he said.
Widodo pledged that in early 2019 all the elements of the early tsunami-warning system would be checked and improved.
On Saturday, a deadly tsunami, triggered by a volcanic eruption, hit the coast of Indonesia's Sunda Strait. Earlier it was reported about 280 dead and more than 1,000 others injured, while over 50 people have gone missing. The tsunami has also destroyed hundreds of homes and public buildings.