JERUSALEM - As a two-minute siren wailed across the country of Israel on Thursday morning in remembrance of the 6 million Jewish victims of the Holocaust, cars pulled over on busy highways, buses stopped at intersections and pedestrians stood in place.
People stopped what they were doing to honor the victims of the Nazi genocide, in which one-third of the Jewish people were murdered during World War II.
In one video, traffic at one of the busiest interchanges in Tel Aviv was completely stopped.
A wreath-laying ceremony at the Yad Vashem memorial followed, with Israeli leaders and Holocaust survivors in attendance. Other ceremonies, prayers and musical performances took place in schools, community centers and army bases around the country.
The names of those who perished in the genocide are typically read aloud in parliament throughout the day.
The annual remembrance is one of the most solemn on Israel's calendar. Restaurants, cafes and places of entertainment shut down, and radio and TV programming are dedicated almost exclusively to documentaries about the Holocaust, interviews with survivors and somber music.
The Israeli flag flew at half-staff.
The Holocaust runs deep in Israeli public consciousness. The state was established in 1948, three years after the genocide ended with the conclusion of World War II, as a place of refuge for Jews across the world. Hundreds of thousands of Holocaust survivors who had lost their families fled there and made it their home.
According to the Hebrew calendar, Holocaust Remembrance Day marks the anniversary of the 1943 Warsaw Ghetto uprising - the most significant, yet doomed, act of Jewish resistance during the Holocaust that helped shape Israel's national psyche, symbolizing strength and the struggle for freedom in the face of annihilation.
The commemoration began Wednesday night, with a state ceremony at country's national Holocaust memorial in which leaders voiced concerns about a rising tide of anti-Semitism worldwide.
President Reuven Rivlin touched on the surging anti-Semitism in Europe, which he said "is once again rearing its head, fueled by waves of immigration, economic crises and disillusionment with the political establishment."
In veiled criticism of Prime Minister Benjamin Netanyahu, he urged the government to rethink its cultivation of alliances with nationalist parties in Europe who have anti-Semitic pasts. Netanyahu has come under fire for embracing a string of eastern European leaders who have lavished Israel with political support while promoting a distorted image of the Holocaust and sought to diminish their culpability while making heroes out of anti-Soviet nationalists involved in the mass killing of Jews.
In his remarks, Netanyahu also stressed the continued threat of anti-Semitic extremism. He said that the extreme right, extreme left and radical Islam agree on "one thing: their hatred of Jews."
This story was reported from Los Angeles. The Associated Press contributed.