Ballistics experts have identified a .32-caliber pistol, seized when police arrested suspects in a Brooklyn robbery, as a weapon used in the killings of four Bedford Hills residents three weeks ago, the chief of the Bedford Hills police said.

The pistol was one of four seized along with three men charged with holding up guests at a Brooklyn birthday party early Sunday.

Bedford Hills Police Chief Knute Johannessen said one of the arrested suspects, Junious Gray, 40, would be charged later in connection with the Bedford Hills murders.

Earlier Tuesday, investigators reported that a 35mm camera discovered in a gold-colored Cadillac owned by Gray's wife was identified as one stolen from the Bedford Hills home of Dr. Charles Frankel.

Frankel, a former assistant secretary of state under President Johnson, and his wife Helen, were killed along with two other Bedford Hills residents on May 10.

Charged with possession of the stolen camera was Gladys Gray, 32, who lives with her husband in the East New York section of Brooklyn.

Gray and two Plainfield, N.J., men - Jimmy Allen, 40, and Jeffrey Davis, 25 - were arrested at the scene and charged with Sunday's robbery in the Flatbush section of Brooklyn.