Italy's ANSA reports a subway worker discovered the suspicious object at the Rebibbia station; the package had pipes and gunpowder inside. Apcom reports police and firefighters are at the scene; there are no reports of injuries.
Update at 10:35 a.m. ET. The Associated Press reports that the package was "full of wires and powder."
Reuters quotes a "spokesman for the Carabinieri, Italy's paramilitary police force," as saying "it didn't have a detonator, it couldn't explode."
Train officials tell the AP that the station was never closed during the incident and service continued.
We've updated our headline.
Update at 9:40 a.m. ET. The Associated Press now reports that:
"Rome's mayor says a device found in a subway car in Rome could not have exploded. Gianni Alemanno was quoted as saying by the ANSA news agency that after examination, bomb-disposal experts said 'the device could not have exploded.' "