A mining company said two of its employees remained hospitalized a day after an accident at an underground limestone mine in western Pennsylvania.
Authorities said three Whitney Quarry workers were hurt Wednesday when the ground apparently shifted, causing a rush of air through the mine entrance.
Officials said the miners were found about 50 feet from the entrance.
Hanson Aggregates said in a statement Thursday that two of the workers received extensive injuries, including broken bones and cuts. The third was treated and released.
The company said it's working with investigators to determine what caused the ground movement. Nobody was in the mine at the time.