The attack in Boulder Sunday comes as the number of antisemitic incidents nationwide tracked by the Anti-Defamation League reached a record high last year.

Hundreds of people came to stand together following an attack in Boulder over the weekend. Speakers included political and faith-based leaders.

The FBI and the U.S. Department of Homeland Security has issued an alert after violent attacks on Jewish and Israeli communities. Incidents in Colorado and Washington D.C. have prompted federal warnings about rising threats of violence linked to the Israel-Hamas conflict.

The suspect, Mohammed Sabry Soliman, accused of throwing incendiary devices at them, allegedly planned the attack for a year, and told police he wanted to "kill all Zionist people," according to court documents.

The FBI and Department of Homeland Security are warning of an "elevated threat" facing the Jewish community in the wake of two antisemitic attacks.