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PITCAIRN (KDKA) — Allegheny County Police are looking for a Pitcairn couple involved in an overdose incident earlier this week that led to the discovery of both suspected drug- and bomb-making materials inside their apartment.

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Police arrested and charged 30-year-old David Klein and 27-year-old Allison Ober on Monday, but both were released on non-monetary bond after being arraigned.

(Source: Allegheny County Police)

Investigators returned to their 2nd Street apartment around 8:30 a.m. Wednesday. In addition to the drug paraphernalia found earlier this week, authorities say they have now found suspected bomb-making materials inside.

“We found what appeared [to be] some material that’s common usage for explosive devices. At that time, we then decided we were going to pull out of this residence for safety, and call the ATF,” said Pitcairn Police Chief Scott Farally.

(Photo Credit: KDKA)

The Allegheny County Bomb Squad was called to the scene, and ordered an evacuation of any structure within 300 feet of the apartment building. That four-story building, a second apartment building and seven to eight homes were all evacuated. Some of the displaced went to the nearby fire hall.

The scene was secured throughout the day, and Chief Farally let the 24 families back into their homes during the evening hours.

The evacuation lasted nearly 10 hours.

Chief Farally is also asking the wanted couple to turn themselves in.

“We are asking for these two people to either bring themselves forward, or anybody who knows their whereabouts, so that way we can actually speak to these people. The male especially to find out what exactly his intent was with these elements he had within this house,” he said.

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On Monday, police were called to the building and found Ober suffering from an overdose, the couple’s 4-year-old child shut in a bathroom and a suspected drug lab.

According to the criminal complaint, officers found Ober lying on the bedroom floor with Klein standing beside her. They gave her a dose of Narcan, and then paramedics took over trying to revive her.

Meghan Schiller’s Report:

In addition to finding the 4-year-old boy in the bathroom, officers say they discovered multiple needles, stamp baggies and other drug paraphernalia in the apartment.

On the back porch, the criminal complaint reports that police found “materials related to the production of hazardous drug substances,” including glass containers, tubes, an unknown powder substance and bottles of unidentified chemicals.

The criminal complaint reports that when police asked Klein what the powder substance was, he told them, “he liked to mix chemicals for fun because he likes chemistry.”

Police then got Klein and his son out of the building. Ober was taken to Forbes Hospital for additional treatment. And the building was evacuated until the substances could be identified and deemed safe.

Klein and Ober are both charged with endangering the welfare of children, causing or risking a catastrophe and reckless endangerment. Additional charges are now pending, says Chief Farally, because of the incendiary devices found in the apartment.

“That’s the whole thing, what were they going to do? It’s the unknown that’s really the scariest thing,” the chief said.

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Police are searching for the couple once again. If you’ve seen them or know where they are, you are asked to call the Allegheny County Police’s Tipline at 1-833-ALL-TIPS (1-833-255-8477).