County narcotics officers on Wednesday arrested a pair of suspected drug dealers accused of selling heroin in Buffalo Township and Butler.

Jacob. B. Timko, 27, of Winfield Township and Chad R. McWilliams, 34, of Butler face drug trafficking charges stemming from separate investigations last year.

The Butler County Drug Task Force said Timko on June 18 and Aug. 13 sold heroin — $50 in one deal and $40 in the other — to a police informant at the Buffalo Plaza on Route 356.

McWilliams is accused of selling four stamp bags of heroin to a police informant on Oct. 16 at an East Jefferson Street convenience store in Butler, according to court documents.

Police noted that both suspects used cell phones to arrange the alleged deals.

District Judge Sue Haggerty arraigned Timko on two counts each of delivery of a controlled substance, possession with intent to deliver a controlled substance and criminal use of a communication facility, all felonies.

He also is charged with two counts each of possession of a controlled substance and drug paraphernalia.

He was placed in the Butler County Prison on $4,000 bail following arraignment. A preliminary hearing in both cases is set for May 11.

District Judge William Fullerton arraigned McWilliams on charges of delivery of a controlled substance, possession with intent to deliver a controlled substance, criminal use of a communication facility, and possession of a controlled substance and drug paraphernalia.

McWilliams was released on his own recognizance following arraignment. His preliminary hearing is set for May 23.