A package that was destroyed by authorities at the US port of Miami after testing positive for plastic explosives has been declared harmless.
The package was initially tested six times, and each time it came back positive for the military-grade explosive known as C4, the Coast Guard said.
The package was then destroyed, and a Miami-Dade County police bomb squad determined it contained sprinkler parts, said Zach Mann, a spokesman for US Customs and Border Protection in Miami.
AP
