A Massachusetts man has been arrested after police said he made violent antisemitic posts online.

Abdullah Ezzeldin Taha Mohamed Hassan, 18, a student at George Mason University, was arrested in connection with an alleged plot targeting Jews, court records show.

Four University of Rochester students were arrested and another is under investigation in connection with the antisemitic "Wanted" posters found on campus.

Nazi protesters rallied outside a Michigan theater during “The Diary of Anne Frank” and two Jewish students were attacked at DePaul, marking the latest high-profile antisemitic incidents in the U.S.

Posters depicting members of the University of Rochester community as “Wanted” that appeared on campus have prompted condemnation from university officials.

A group of masked demonstrators were seen waving Nazi flags outside a production of "The Diary of Anne Frank" in Howell, Michigan, on Saturday.

A group of masked demonstrators waved Nazi flags outside a production of "The Diary of Anne Frank" in Howell, Michigan on Saturday.

ABC News' Britt Clennett reports on the violence aimed at Israeli soccer fans in the Netherlands where at least 60 people were arrested and several others hospitalized.

Masked attackers allegedly punched the students, according to the university.

Two Jewish students showing support for Israel were attacked by "masked attackers" on the Lincoln Park campus at DePaul University in Chicago, the university said.

It says universities have failed to adequately discipline antisemitic conduct.

Rabbi Charlie Cytron-Walker and his congregants were held hostage at gunpoint in January 2022 during an attack at their Texas synagogue.

A 20-year-old man was arrested in Canada for an ISIS-inspired plot to "slaughter" Jewish people.

A Pakistani national in Canada was charged with attempting to provide material support to ISIS after allegedly plotting to attack Jewish people, federal prosecutors said Friday.

Harvard University "failed its Jewish students" and must face a lawsuit over antisemitism on campus following the Oct. 7 Hamas attack against Israel, Judge Richard Stearns ruled.

Jurors returned a partial a verdict Thursday in the trial of a man accused of killing Samantha Woll, a Detroit synagogue leader.

A Georgian man has been indicted for allegedly planning a mass casualty attack on Jews and racial minorities in New York, and encouraging others to commit violent acts.

New York City police released a new wanted poster as they continue to look for the man who yelled for Zionists riding on a subway train to identify themselves.

NYPD detectives are now working to identify the call-and-response leader, who is expected to be charged with attempted coercion, police sources told ABC News.

In one incident, masked protesters took over a New York City subway car and demanded riders to identify themselves if they are Zionists.

University leaders from Northwestern, Rutgers and UCLA will testify as the committee’s main witnesses.

A Ventura County judge ruled that a pro-Palestinian demonstrator will stand trial in the death of a Jewish man at a protest last fall.

New York City Public Schools Chancellor David Banks appeared on Capitol Hill this week to testify about antisemitism in K-12 schools. He discusses the congressional hearing.

President Joe Biden delivered a major speech denouncing antisemitism on Tuesday at the U.S. Capitol.

President Joe Biden spoke at the U.S. Holocaust Memorial Museum's annual Days of Remembrance.

The House passed the Antisemitism Awareness Act on Wednesday amid unrest on college campuses.

The bill was introduced by a bipartisan group of lawmakers calling to add a more specific definition of antisemitism than what exists in the Civil Rights Act.

NYU ramped up security after clashes with police and Cal Poly Humboldt closed the campus after protests turned violent as demonstrations about the Israel-Hamas war continue across the country.

Sunday saw the fifth consecutive day of protests at Columbia University, where over 100 people have been arrested.

Officials say the holiday, which begins Monday, may serve as a catalyst for extremist groups and individuals to commit acts of violence against Jewish faith-based communities.

Columbia University President Nemat "Minouche" Shafik testified Wednesday before a congressional committee investigating antisemitism on the New York City campus.

A rise in antisemitism since Hamas' Oct. 7 terror attack on Israel is part of "preexisting increase ... around the world," Alejandro Mayorkas said

A former ride-share driver has been arrested after launching an attack on a passenger because he perceived the individual to be Jewish or Israeli.

College students opened up to U.S. lawmakers on Thursday, telling them they are in fear over the rise in antisemitism on campuses since the start of the Israel-Hamas war.

Reports of antisemitism and Islamophobia have flooded universities across the U.S. amid rising tensions over the Israel-Hamas war.

Investigators are working to determine why the active-duty airman set himself on fire in front of the Israeli Embassy.

Harvard University is under scrutiny once again, after a collective of student groups posted an antisemitic cartoon on social media.

House Republican committee subpoenaed Harvard University for obstructing its antisemitism investigation.

The U.S. Department of Education opened an investigation into Harvard University for discrimination after Arab and Muslim students filed a civil rights complaint.

On Thursday, Dion Marsh admitted to violent attacks against five members of the Orthodox Jewish community in New Jersey in 2022.

The bestselling author of “Lily’s Promise” discusses meeting with the second gentleman on antisemitism and the message his great-grandmother, who survived the Holocaust, has for younger generations.

A group of Jewish students at Harvard University have filed a federal lawsuit claiming the school fosters antisemitism.

Harvard's former president is speaking out following her resignation from her role in an op-ed.

Embattled Harvard University President Claudine Gay has resigned, she announced on Tuesday.

Deputy U.S. Attorney General Lisa Monaco speaks about the increase in threats of violence against Jews and Muslims here in the United States during the ongoing conflict in the Middle East.

Cleaning could take several days, officials say.

Nationwide swatting spree targetting nearly 200 Jewish institutions appears coordinated, coming from outside the U.S., says FBI spokesperson.

Police have opened a hate crime investigation after a 9-foot-tall menorah was destroyed and thrown into a lake in Oakland, California.

The online platform Discord tipped off the FBI that a teenager in one of its online spaces had discussed shooting up a Jewish temple in Ohio.

Antisemitic hate incidents have plagued Los Angeles County since the Israel-Hamas war began on Oct. 7, according to Los Angeles County District Attorney George Gascón.