PORTLAND, Ore. (KOIN) -- An M-80 style firework caused a portable toilet to explode in a Gresham neighborhood Friday night, authorities told KOIN 6 News.

When police arrived near 3800 SW Sandlewood Lane, they found the porta-potty already blown up. Fire crews came and determined a firework was lit inside the toilet.

"It flamed up while officers and firefighters were on the scene," Gresham police said.

The situation was handled but the investigation by the Explosive Disposal Unit will continue.

No injuries were reported.

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