A grandmother looking for her lost cat apparently fell into a sinkhole that had recently opened above an abandoned western Pennsylvania coal mine and rescuers worked late into the night on Tuesday to try and find her.
Bright lights illuminated snow flurries and various equipment at the site while crews worked above and below ground, video from the scene showed.
Crews lowered a pole camera with a sensitive listening device into the hole in Marguerite on Tuesday morning but it detected nothing.
A camera lowered into the hole showed what could be a shoe about 30 feet (nine metres) below the surface, according to Pennsylvania State Police spokesperson, trooper Steve Limani.
“It almost feels like it opened up with her standing on top of it,” Mr Limani said.
The family of Elizabeth Pollard, 64, called police at about 1am on Tuesday to say she had not been seen since going out on Monday evening to search for Pepper, her cat.
Police said they found Ms Pollard’s car parked near Monday’s Union Restaurant in Marguerite, about 40 miles (65 kilometres) east of Pittsburgh. Ms Pollard’s five-year-old granddaughter was found safe inside the car.
The manhole-sized opening had not been seen by hunters and restaurant workers who were in the area in the hours before Ms Pollard’s disappearance, leading rescuers to speculate the sinkhole was new.
Authorities used an excavator to dig in the area, where temperatures dropped to below freezing overnight.
“We are pretty confident we are in the right place. We’re hoping there is still a void she could be in,” Pleasant Valley Volunteer Fire Company chief John Bacha told Triblive.
By late afternoon, searchers were using access to a mine to try to find her and had dug a separate entrance out of concern that the ground around the sinkhole opening was not stable. Authorities vowed to keep searching for Ms Pollard until she is found.
Ms Pollard lives in a small neighbourhood across the street from where her car and granddaughter were located, Mr Limani said.
The young girl “nodded off in the car and woke up. Grandma never came back,” Mr Limani said. The child stayed in the car until two troopers rescued her. It is not clear what happened to Pepper.
Police said sinkholes are not uncommon because of subsidence from coal mining activity in the area.
A team from the Pennsylvania Department of Environmental Protection, which responded to the scene, concluded the underground void is likely the result of work in the Marguerite Mine, last operated by the HC Frick Coke Company in 1952. The Pittsburgh coal seam is about 20 feet (six metres) below the surface in that area.
Department of Environmental Protection spokesperson Neil Shader said the state’s Bureau of Abandoned Mine Reclamation will examine the scene after the search is over to see if the sinkhole was indeed caused by mine subsidence.
Search extends into night for US woman who may have fallen into sinkhole
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