A manhunt was underway on Wednesday as the F.B.I. and several local police departments searched a swath of central New Jersey for a man wanted in connection with the Jan. 6 riot at the United States Capitol.
The F.B.I. circulated a photo that it said showed the man, Gregory Yetman, taking part in the attack two years ago.
Armed law enforcement officers were seen searching the backyard of a home and a shed in Helmetta, N.J., a suburban community in Middlesex County, in video footage shot by NBC News.
The F.B.I. and local authorities declined to provide information about Mr. Yetman or the charges he faces.
But USA Today reported earlier this year that Mr. Yetman, who it identified as a former military police sergeant in the New Jersey National Guard, had been interviewed by the F.B.I. about his participation in the riot, and that he was believed to have fired a large canister of pepper spray at protesters and police officers.
In an interview with the paper, Mr. Yetman admitted to being at the Capitol on Jan. 6 but denied any wrongdoing.
This is a developing story and will be updated.