A robot using water jets was used to ensure the device was safe, officials said.
But later they added that they were not sure whether it was a genuine explosive device or a dummy.
German police have said a package containing nails, wires, batteries, fireworks and powder found near a Christmas market in the eastern German city of Potsdam near Berlin did not contain an ignition device.
Earlier, officers said special forces were examining the object, which was described by the Potsdamer Neueste Nachrichten newspaper as a package measuring 40cm (15.75in) by 50cm that had been delivered to a pharmacy near the market.
Brandenburg state Interior Minister Karl-Heinz Schroeter told reporters the powder will be analyzed.
Police have evacuated a Christmas market and the surrounding area in the German city of Potsdam, near Berlin, Germany, December 1, 2017, to investigate a suspicious object.
"We are now carrying out searches because the package was delivered, apparently, and possibly other packages had been delivered nearby the Christmas market". It contained suspicious wires and electronics, according to a local newspaper.
In that case, a Tunisian man hijacked a truck and drove it into a crowded market, killing 12 people in an attack that was later claimed by the Islamic State group.
The country remains on high alert since the 2016 terror attack at a Christmas market in Berlin. The suspect, Anis Amri, was killed later in a shootout with police in Italy.