Treacherous Hudson River waters forced divers to suspend their search Monday for two remaining bodies and the wreckage of a small plane that collided over the weekend with a sightseeing helicopter, killing nine people.

Divers believe they found pieces of the private plane’s wreckage but had to pull out because of treacherous conditions, said NYPD spokesman Paul Browne. They hoped to resume the search later Monday afternoon.

During their brief time just south of where the plane went down, the divers “encountered what they believe were pieces of the plane,” Browne said.

Of the six bodies in the helicopter, divers recovered two on Saturday morning and two more that afternoon. Two were trapped in the wreckage and could be extricated only once it was hoisted on a pier in Hoboken, Browne said.

The seventh body — the teen plane passenger — was found floating Saturday near Pier 40 in Manhattan.