Three Homes Destroyed in US Explosion, Multiple People Unaccounted For

Authorities say three people are unaccounted for following a house explosion in western Pennsylvania that destroyed three structures and damaged at least a dozen others.
Allegheny County officials said three people were taken to hospitals after the blast that happened shortly before 10:30 a.m. Saturday in the borough of Plum.
County spokeswoman Amie Downs said emergency responders reported people trapped under debris after one house apparently exploded and two others were engulfed in flames.
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