A bozo waving a Palestinian flag ran onto the field at Yankee Stadium during Friday night’s Subway Series game — at 9:11 p.m. on the 25th anniversary of the Sept. 11 terrorist attacks.

The man stormed the field during the seventh inning of the Yankees-Mets game in The Bronx, waving the flag as the crowd erupted in anger.

Some fans broke into chants of “USA! USA!” while others could be heard yelling “f–k you” at the man.

The disruption came as New York marked 25 years since the Sept. 11, 2001 terrorist attacks.

It was not immediately clear how the man managed to get onto the field.

Fans tossed drinks at the protester, who was kicking at the security guards as they carried him off the field.

The spectacle came on a night steeped in emotion at Yankee Stadium, where the crosstown rivals had gathered to commemorate a quarter-century since the terror attacks that killed nearly 3,000 people.

Before the first pitch, the Yankees played a seven-minute video on the outfield scoreboard featuring members of the 2001 team reflecting on the aftermath of the attacks.

Derek Jeter, Andy Pettitte, Paul O’Neill, Bernie Williams and Jorge Posada were among the former Yankees featured in the tribute.

Country singer Lee Greenwood then performed “God Bless the USA,” drawing roaring applause — followed by chants of “USA” from the stands.

The Yankees also welcomed back members of the 2001 team, whose run to the World Series that fall unfolded as a grieving city struggled with the aftermath of the attacks.

Jeter, Posada, O’Neill, Tino Martinez, Scott Brosius, Mariano Rivera and former manager Joe Torre walked onto the field to loud applause before the game.

Two people who lost their fathers in the attacks — Brielle Saracini and her husband, Sean McGuire — threw out the ceremonial first pitches.

More coverage on the 25th Anniversary of 9/11:

• Condoleezza Rice apologizes to families for failing to prevent 9/11
• 9/11 25th anniversary live updates: JD Vance unites with Clinton, Obama, Biden, Bush at Ground Zero ceremony
• Rudy Giuliani shakes Zohran Mamdani’s hand at NYC 9/11 memorial ceremony after calling on mayor to skip
• Sept. 11 widow blasts Saudis: ‘How can it be 25 years and still we have no justice?’

Both were 10 years old when their fathers were killed on Sept. 11, 2001. The pair later met at Camp Better Days, an organization created to support children who lost parents in the attacks.

Members of the 2001 Yankees stood behind the couple near the mound as they delivered the pitches.

Mets interim manager Andy Green had described the significance of the matchup before the game.

“It’s gonna be special,” Green told reporters.

“I think obviously it takes us back 25 years and all of the emotions and uncertainty we felt that day. The pain we felt for people who lost loved ones.”

“It’s gonna be incredibly special. Major League Baseball got this one right by putting these two teams against each other on this day.”

— Additional reporting by Thomas Gamba-Ellis