Police say the "30 Rock" star was taken into custody at about 10:15 a.m. Tuesday. They say two officers noticed him riding his bicycle the wrong way on 16th Street near Fifth Avenue near Union Square Park.
They say the notoriously hot-headed actor was asked to show identification. That's when they say he acted belligerently toward the officers and was arrested. He's since been released.
An insider tells In Touch, "He was riding his bike the wrong way and didn't have ID on him. He was not arrested or charged with a crime. He has been released."
A representative for Baldwin didn't immediately return a request for comment.
Police say the 56-year-old actor was issued a summons for riding a bike the wrong way and for disorderly conduct.
The Associated Press contributed to this report