Thousands of people have marched from Auschwitz to Birkenau death camps in Poland to celebrate the six million Jews killed in the Holocaust.
Led by Israeli President Reuven Rivlin, many of the marches were draped in Israeli flags when they walked 3 km lane between the death camps Thursday.
People throughout Israel also stood silent for two minutes in Thursday when sirens blew. Traffic was stopped when drivers left their vehicles to participate in the Holocaust Remembrance Day, Israel's highest day.
Marsch comes as Warsaw adopted a controversial law of fines or imprisonment for those who owe the Polish people or the state of cruelty committed by Nazi Germany during World War II.
Critics, including many in Israel, say that the law is loosely formulated and could be misused to deny or abolish Polish responsibility for crimes against the Jewish people.
The law is being presented by the Polish constitutional court.
Prime Minister Benjamin Netanyahu attended a coronary ceremony at the Yad Vashem Holocaust Memorial in Jerusalem on Thursday.
On the very Holocaust Remembrance Day, Netanyahu drew comparisons between the Nazi regime and contemporary Iran, issuing a strict warning to "not test the determination of the state of Israel."
Israel is concerned that its archival rival Iran strengthens its military performance mission in Syria as a civil war that winds down.
"During the Holocaust we were helpless, defenseless and voiceless. In fact, our voice was not heard at all. Today we have a strong country, a strong army, and our voice is heard among the nations," said the prime minister.
But a senior Iranian official has warned Israel on Thursday not to provoke it after Netanyahu's warning to Tehran. 19659003] Ali Shirazi, a aide to Iran's supreme leader, was quoted by the semi-functional Fars news agency to say Iran is capable of destroying Israel.
He said "If you apologize for Iran, Tel Aviv and Haifa will be thrown down to earth."