Generate a context and a hypothesis.
Context: × Possible pipe bomb explosion reported at East Chicago post office EAST CHICAGO, Ind. – Authorities in northwest Indiana are at the scene of an explosion involving possible pipe bombs, WGN reports. The scene is at a post office in East Chicago near Kennedy and Chicago Ave. Reports suggest that a possible postal worker has been injured. We will update this story as more information develops.

Hypothesis: No one was injured in the explosion.