The Butler County Drug Task Force Saturday arrested two Pittsburgh men accused of selling crack cocaine out of a Butler home.

Officers, meanwhile, are looking for the tenants — one a substitute school teacher — who left their house on South Main Street just minutes before officers raided it.

Jeffery Soverin, 24, and Carlos E. Francois, 23, are in the Butler County Prison on $25,000 bail each.

Both suspects are charged with possession with intent to deliver a controlled substance, conspiracy to deliver a controlled substance, and possession of a controlled substance and drug paraphernalia.

Authorities, meanwhile, this week expect to file misdemeanor charges in the same case against Andrew Kovalcik, 27, and Karissa Kreidler, 24, who are the listed renters at 743 S. Main St.

Kreidler during the current school year worked at the Butler and Slippery Rock school districts as a substitute teacher.

Police had been watching the home since Jan. 26 for suspected drug activity, said Butler County chief detective Pat Cannon, who heads the task force.

During the investigation, a police informant went to the home at least twice and bought crack from Soverin and Francois, documents said.

District Judge Sue Haggerty on Saturday issued a search warrant for the house.

But 10 minutes before task force officers got there Kovalcik and Kreidler left the house.

“We don’t know why,” Cannon said. “It might have been dumb luck. They might have left to go somewhere.

However, they did not return. The couple moved here from Scranton, a location of interest for authorities in their search, Cannon said.

Kreidler worked 39 days at the Butler School District during the current school year, said Superintendent Ed Fink. She filled in as a substitute teacher at secondary and elementary schools.

She worked 30 days in the district during the 2010-11 school year, Fink said.

Slippery Rock School District Superintendent Kathy Nogay said Kriedler worked as a substitute teacher only one day at the middle school during the 2011-12 year.

Kriedler also was on the district’s day-to-day substitute teacher list last school year. Nogay said she did not immediately know how many days Kriedler worked in 2010-11.

Task force officers searching the house, meanwhile, found Soverin and Francois on the second floor of the home.

Soverin was found with more than 4 grams of crack and $944 in currency, documents said. Francois was carrying $286. Some of the money they had, officers said, were the bills that police had recorded and used in the earlier controlled drug buys.

The search also turned up a baggie of suspected marijuana in the upstairs toilet.

In the bedroom used by Kovalcik and Kreidler, documents said, officers found empty bags of suspected heroin and two spoons with suspected heroin residue.

More contraband, officers said, including a digital scale and marijuana grinder, were found on the first-floor in the dining/living room area.