SINGAPORE, March 26 -- Singapore's Prime Minister Lee Hsien Loong has written to his Malaysian counterpart Najib Razak to express condolence on the loss of Malaysia Airlines Flight MH370, local TV Channel NewsAsia reported on Wednesday.

While Lee recognised the difficult situation, he hoped the new information would provide more certainty and some closure to families and relatives of those on board.

Speaking to reporters after attending the Nuclear Security Summit in The Hague, Lee said he also sent condolences to Malaysian Deputy Prime Minister Muhyiddin Yassin, and Chinese President Xi Jinping, both of whom he met at the meeting.

On Monday, Najib announced that the missing aircraft ended its journey in the southern Indian Ocean, citing new satellite data.

Lee understood that some relatives were still not satisfied because of the lack of physical evidence.

"We just have inferences from the information, from the satellite communications, from the calculations which have been done, and I hope it will be possible to find that physical evidence, and have that certainty, and absolute confidence, and closure within a reasonable time.

"It's something very difficult to do because you are searching a very remote area, in very extreme conditions, at a very wide area now where the debris is potentially scattered, and to find it, and to confirm it is not a simple matter at all. So, we hope it will be possible. I think the countries are all trying their best, " said Lee.