Protesters gathered in cities across the United States on Saturday in protest of President Donald Trump's attack on Iran.

An Iranian flag waves over a protest held by the Party for Socialism and Liberation, along with other activist groups, against the war in Iran outside the White House in Washington, D.C., on Saturday. Photo by Bonnie Cash/UPI UPI People hold posters during a protest put on by the Party for Socialism and Liberation, along with other activist groups, against the war in Iran outside the White House in Washington, D.C., on Saturday. Photo by Bonnie Cash/UPI UPI People hold posters during a protest put on by the Party for Socialism and Liberation, along with other activist groups, against the war in Iran outside the White House in Washington, D.C., on Saturday. Photo by Bonnie Cash/UPI UPI A protestor argues with a Metropolitan police officer after allegedly being shoved by a counterprotestor during a demonstration against war in Iran outside the White House. Photo by Bonnie Cash/UPI UPI A member of the Handmaid Army DC signs a giant copy of the United States Constitution during a protest outside the White House. Photo by Bonnie Cash/UPI UPI

Feb. 28 (UPI) -- Hundreds of people gathered outside the White House in Washington, D.C., and at other locations across the capital on Saturday in protest of the country's attack on Iran.

Organizers coordinated protests within hours after President Donald Trump announced a coordinated U.S.-Israeli military strike on several locations in Iran. Hundreds have died in the attacks, including, Trump says, Iran's supreme leader, Ayatollah Ali Khamenei.

Demonstrations were also planned in other major U.S. cities, including New York City, Chicago, Denver, Atlanta, Baltimore, Boston, Cincinnati, Las Vegas, Los Angeles, Miami and Minneapolis, The Hill reported. Others were scheduled for Sunday in Albany, N.Y.; Ellensburg, Va.; Chattanooga, Tenn,; Decorah, Iowa; Gainesville, Fla.; and Springfield, Mo.

...

A group of organizations that included the Freedom Road Socialist Organization, 50501 DC and Code Pink coordinated the protests outside the White House. The demonstrators later marched along streets in the city, The Washington Post reported.

Some in the crowd chanted, "No hate, no fear, Iranians are welcome here." Others: "From D.C. to Iran, stop the war, stop the bombs."

Metropolitan police officers and Secret Service agents were on hand for the D.C. gatherings, in some cases blocking roads to let marchers pass. The Metropolitan Police Department said on X that it was monitoring events in Iran and coordinating with other law enforcement agencies to protect people in the capital.

"At this time, there are no known threats to D.C.," the post read. "We are prepared to increase our presence as needed."

Groups also took to Times Square to denounce the strikes, WABC-TV in New York City reported.

One protester, Mammad Mah, said his 78-year-old mother was in Iran and he hadn't heard from her since the strikes took place. Internet and phone service in Iran had been cut off.

"There's no one that hates the ayatollahs, hates the mullahs as much as we do," he said. "But none of that justify attacking a nation and killing innocent people."

A University of Maryland poll taken earlier this month found that 49% of Americans were opposed to attacking Iran and 30% were unsure. Twenty-one percent supported the United States initiating an attack on Iran.

Among Republicans, 40% favored action, 25% opposed and 35% were unsure. Six percent of Democrats favored action, 74% opposed and 19% were unsure. Among Independents, 21% favored action, 51% opposed and 28% were unsure.