(Contra Costa Times) No one was injured when a package with fireworks inside self-ignited and began smoldering inside the Walnut Creek’s (Calif.) main post office this morning, officials said.Police were told of a suspicious package smoldering inside the post office’s sorting room about 4:25 a.m.

A postal worker (mail processing clerk) took the package to a safe location outside the building in the 2000 block of Broadway. The worker told police that the package was giving off a chemical odor.

Fire and hazardous-material crews responded and found that the package had self-ignited.

“Basically when we arrived, a postal worker noticed smoke coming from the container so they put it outside,” county hazardous materials spokesman Neal Price said. “We inspected the package from a distance of about 5 to 10 feet and observed no off-gassing.”

A team member wearing protective equipment opened the box about 6:30 a.m.

“We noticed it was (chinese party) poppers,” Price said. “Some of them had gone off inside the package. We just separated it out and turned it over to the postal inspector.”

source: CONTRA COSTA TIMES