PITTSFIELD — Authorities searched Pontoosuc Lake for a second day Wednesday in connection with the discovery of a vehicle registered to a missing New York man.

The search was initiated Tuesday, a day after police received reports of a suspicious vehicle in the parking area of Blue Anchor Park, which is shared with the Rusty Anchor, according to Lt. Gary Traversa of the Pittsfield Police Department.

The operation stretched on for seven hours Tuesday before authorities decided they needed more “resources and equipment” to continue, according to Traversa.

Authorities searched the southern portion of the lake for several more hours Wednesday, including the use of dive teams and sonar. The search was suspended for the day by 3 p.m., according to Police Chief Michael Wynn, and authorities are developing a plan to continue looking today.

“We’re gonna have to regroup and come up with a follow-up plan,” Wynn said.

Police learned that the vehicle was registered to a man who had been reported missing May 5 in New York state. Authorities asked the public to avoid Blue Anchor Park and the Pontoosuc Lake boat ramp while the search continued Wednesday.

Traversa said investigators believed it was unlikely that the missing person left the area “by any other means” and launched a search of the lake before 8 a.m. Tuesday with the Berkshire County Sheriff’s Office, Massachusetts Environmental Police and state police.

Asked whether the man’s disappearance was thought to be suspicious, Wynn said, “I wouldn’t say it’s suspicious, but it’s cause for concern.”

He said there is no evidence that anyone else was involved.

Items located in the missing man’s vehicle prompted police to launch the search.

“We don’t know if we [are] looking for a body,” Wynn said. “Based on the items we found in the car, we felt we had to eliminate the possibility that the subject had gone into the lake.”

The vehicle was towed from the scene by investigators.

Amanda Burke can be reached at aburke@berkshireeagle.com, on Twitter

@amandaburkec and 413-496-6296.

Cops and Courts Reporter

Amanda Burke is Cops and Courts Reporter for The Berkshire Eagle. An Ithaca, New York native, she previously worked at The Herald News of Fall River and the Fitchburg Sentinel & Enterprise.