(KRON) — Video posted to Twitter appears to show a jet fighter intercept a plane that flew into air space over Marin County that was restricted due to President Joe Biden’s Bay Area visit. In the video, a fighter jet can be seen cutting off the path of a slower moving, single-engine plane flying over Marin County Tuesday.

NORAD officials confirmed on Twitter that fighter aircraft have responded to several general aviation aircraft that have violated temporary flight restrictions near San Francisco on Tuesday.

“Pilots in the San Francisco area are strongly encouraged to check NOTAMS today and tomorrow to ensure they have the latest information on the VIP TFR,” NORAD tweeted.

“NOTAM” is an acronym for “notice to airmen.”

In a statement posted to Twitter, the Marin County Sheriff’s Office said it was “aware of the event in the Central Marin area,” and had “a variety of Law Enforcement resources detailed to the event.”

“We request that any persons who do not live in the immediate area stay away due to the fact , roadways are restricted in various locations.”

KRON4 reached out to the United States Secret Service, which said it was aware of the aircraft violations, but that there was “no impact” to President Biden’s visit.

President Biden is in the Bay Area for a three-day visit. After arriving Monday, he visited a nature preserve in Palo Alto where he announced a $600 million climate initiative. On Tuesday, he was in San Francisco meeting with technology leaders to discuss AI.

Biden will also attend four Bay Area fundraisers as he ramps up his reelection campaign.

While in the Bay Area, news broke that President Biden’s son, Hunter Biden had pleaded guilty to tax and weapons charges. During a meeting in San Francisco on AI Tuesday, Biden responded, “I’m very proud of my son,” to a shouted question from a reporter about the matter.