A bomb squad was called to the scene and the situation no longer posed a threat to the population, he said.
"All I can say is that the device was potentially explosive," Goeman said, adding that the investigation was still under way.
The event took place in the Brussels district of Schaerbeek, which has a significant Turkish population.
The Belgian official reports that the bag contained a potentially-explosive mechanism, but the official laboratory report is awaited to determine whether it was actually an explosive mechanism.
The terror group PKK has also intensified its attacks against Turks in European countries, following the detention of its political wing, the HDP deputies, due to their open support to the terror group and its members.
The terror group is also being allowed to protest against the Turkish state in many European cities, declaring war on the government and demanding the release of their imprisoned leader, Abdullah Öcalan.
President Recep Tayyip Erdoğan recently revealed weapons confiscated from the PKK in fresh anti-terror operations were mainly Western-made, including heavy weaponry.
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