Three employees were exposed to a hazardous chemical when a package exploded Saturday morning at a Maryvale post office, Phoenix fire officials said.

Fire crews responded to the U.S. post office near 4400 N. Maryvale Parkway on reports of a chemical spill, according to an email from Phoenix fire Capt. Danny Gile.

The spill turned out to involve a shattered glass bottle of acetone, the Associated Press reported. Gile later told the AP "there was no malicious intent suspected" in connection with the package.

"Workers at the post office reported a package that had exploded spilling an unknown chemical and exposing three employees," Gile said in the email.

All of the employees are in stable condition with minor complaints, and they are being evaluated.

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