STAMFORD — Three people were charged after city police conducted a sobriety checkpoint Thursday night, according to police.

The checkpoint was in the area of Stillwater Avenue and Alden Street, Capt. Diedrich Hohn said.

When the first vehicle came through the checkpoint, a sergeant noticed the driver smelled of alcohol, Hohn said. He said further investigation confirmed that 25-year-old Nelson Euceda-Discua was under the influence of alcohol.

Hohn said a breath test indicated Euceda-Discua’s blood alcohol concentration was .191 and .195. The legal limit is .08. Officers searched Euceda-Discua and found powder cocaine in his possession, Hohn said. He was charged with operating under the influence and possession of narcotics.

“This OUI checkpoint shows how important it is to get inebriated operators off the road in that the first operator evaluated was intoxicated,” Hohn said.

Officers also stopped Howard Reid, 40, who was drinking alcohol in an open container while driving a vehicle that Hohn said was filled with marijuana smoke.

“This party on wheels was dismantled and Reid was charged,” with drinking while driving, possession of marijuana and possession of drug paraphernalia, Hohn said.

But then, Hohn said, a 36-year-old man tried to “upstage the drivers by walking in and out (of) the checkpoint ... yelling and screaming.”

The man, identified by Hohn as Sherman Owens, was warned by officers to leave the area. Instead, Hohn said, Owens “came back and punched over an OUI checkpoint sign and was taken into custody.”

Hohn said Owens was aggressive, non-compliant and had a knife in his pocket.

When Owens was taken to police headquarters, it was found he had a domestic warrant for two counts of second-degree assault, breach of peace and disorderly conduct. He was additionally charged with possession of a dangerous weapon and interfering with an officer.

Other than these three arrests, officers made three additional marijuana seizures, Hohn said. He said officers also recorded one operator driving under suspension, four drivers without licenses and one citation for reckless use of the highway by a pedestrian.