PORTSMOUTH — An Exeter man is being held without bail for three felonies alleging he intentionally drove into a flagger on Islington Street, then left the scene.

Charged with the crimes is Robert Frese, 61, of 43 Hayes Park. Police allege that on Aug. 8 Frese was driving a PT Cruiser with the vanity license plate “TRUMP1” when he deliberately drove into the flagger, causing personal injury.

He was arrested on a warrant Monday for charges of first-degree assault, reckless conduct and conduct after an accident that caused personal injury. Frese is being held without bail because he was under bail conditions mandating his good behavior, said Police Chief Robert Merner.

Fire Chief Steve Achilles said last week it was a “low-speed” incident that caused the flagger to be spun around and knocked to the ground. Achilles said firefighters responded and assisted the 64-year-old flagger, who said he was directing traffic around construction on Islington Street when he was hit. The flagger told firefighters he informed the driver the road was closed and when he turned to walk away, he was struck, Achilles said.

The flagger complained of back pain and had a minor knee injury, the fire chief said. After he was evaluated by firefighter EMTs at the scene, the flagger was transported to Portsmouth Regional Hospital in “stable condition” and with “minor injuries,” Achilles said.

In May, Frese was arrested by Exeter police for a charge alleging he was trespassing by rummaging through a private dumpster behind a business, after he was given prior warnings about trespassing.

In 2013, Frese pleaded guilty to a federal charge of Social Security fraud, admitting he fraudulently received SSI benefits totaling $62,134 while failing to report "a substantial inheritance" he'd received from the estate of a deceased family member.

Frese is scheduled to be arraigned Tuesday for the Portsmouth charges.