Washington: The US President Barack Obama on Thursday drove down to the Japanese embassy here to express his condolences to the victims of Japan devastated by the monster earthquake-cum-tsunami.

Obama again called it a ‘heart-breaking’ tragedy and said that America was willing to provide any assistance to the Japanese.

"Because of the strength and wisdom of its people, we know that Japan will recover, and indeed will emerge stronger than ever," Obama wrote in the condolence book.

"As it recovers, the memory of those who have lost will remain in our hearts, and will serve only to strengthen the relationship between our two countries. May God bless the people of Japan," Obama added.

The Japanese Ambassador to the US, Ichiro Fujisaki, said: "We are so grateful to the President and the people of the United States."

Obama showed solidarity with the Japanese people in this tough period and said "As I told Prime Minister Kan and reaffirmed at the Japanese embassy here in Washington, the Japanese people are not alone in this time of great trial and sorrow. Across the pacific, they will find a hand of support extended from the US as they get back on their feet."

N-Radiations unlikely to reach US

Obama said on Thursday that he does not expect the harmful radiation from a crippled Japanese nuclear plant would reach the US.

“We do not expect harmful levels of radiation to reach the United States, whether it's the West Coast, Hawaii, Alaska or US territories in the Pacific,” he said in a speech at the White House.

He urged the US citizens in Japan to monitor carefully the situation and follow the guidance of the US and Japanese governments.