NEW YORK (AP) — Attorney General William Barr ordered federal prosecutors across the U.S. to step up their efforts to combat anti-Semitic hate crimes as he met with Jewish leaders in Brooklyn, New York, on Tuesday.

Barr said he has been “extremely distressed by the upsurge in violence” in Jewish communities, including in New York City, which saw a string of anti-Semitic attacks during the Hanukkah holiday.

The attorney general said the Trump administration would have “zero tolerance for this kind of violence.”

Barr’s visit came a day after the 75th anniversary of the liberation of the Auschwitz-Birkenau death camp in Poland, where survivors warned of rising anti-Semitism worldwide. It also came on the same day as President Donald Trump unveiled a Middle East peace plan that called for the creation of a State of Palestine with its capital in east Jerusalem while recognizing Israeli sovereignty over major settlement blocs in the West Bank — something the Palestinians are unlikely to accept.