(CNN) – A father and his 17-year-old son were hospitalized after their house in Egleston Township exploded.

The two were reported to be in critical condition Tuesday. Both were badly burned but expected to survive.

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They were in the basement when the house suddenly blew.

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Firefighters worked for hours to extinguish the ongoing blaze and while there is no cause of how it happened, authorities say there was no immediate indication of anything suspicious.

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