Police arrested two men and a woman this week in connection the slaying of a man found shot inside a Pittsburg warehouse last month, authorities said.

Montino Lewis, Tiffany Brown, both 29, and Robert McClary, 45, were all taken into custody on suspicion of murdering Jerron Griffin, 30, who was gunned down in an industrial part of the city Aug. 18, said Capt. Ron Raman, a police spokesman.

Around 3 a.m., officers responded to reports of a disturbance on the 500 block of Garcia Avenue, near Railroad Avenue and Highway 4, officials said.

The victim, later identified as Griffin, was found suffering from at least one gunshot wound inside a business in the area, which is mostly populated by warehouses, police said.

Investigators believe that Griffin exchanged words with one of the three suspects before he was shot. Police are still looking into a possible motive for the shooting, Raman said.

Police said they found evidence of marijuana cultivation at the business, including several marijuana plants, but did not say whether the shooting was drug-related.

McClary was arrested at his Oakland home Wednesday night, Raman said, Brown was arrested at her workplace on Thursday and Lewis turned himself in to police later the same day.

All three remained in custody at the Martinez Detention Facility, booked for murder and other felonies. Formal charges are expected to be filed soon by the Contra Costa District Attorney’s Office.

Kale Williams is a San Francisco Chronicle staff writer. E-mail: kwilliams@sfchronicle.com Twitter: @sfkale