Four people died in a house bombing in Pennsylvania.

Four people were killed and three were hospitalized in an explosion and subsequent fire in a house in a suburb of Pittsburgh in the US state of Pennsylvania, local authorities said on their Twitter page.

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“Investigators are now confirming that four people have died and a fifth is currently missing,” Allegheny County officials said in a statement.

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Emergency services arrived at the scene after reports that several houses caught fire after the explosion. According to the channel, the explosion destroyed three houses and damaged at least a dozen other buildings.

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Three more people were hospitalized, two are in stable condition and one is in critical condition.

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The cause of the explosion is being investigated.