Poland charges three of its own citizens with working for Russian intelligence
They are accused of spreading disinformation, preparing acts of sabotage, and carrying out reconnaissance of NATO troops.
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They are accused of spreading disinformation, preparing acts of sabotage, and carrying out reconnaissance of NATO troops.
However, the Pentagon's spokesman stopped short of confirming that there would be no reduction in troop numbers in Poland.
Leading US media outlets have reported that the deployment of almost 4,000 American troops was cancelled at the last minute.
The Sullivan Cup is a gruelling biennial contest hosted by the United States to evaluate the best tank crews.
Unexploded ordnance from World War Two is regularly found around Poland.
The ABW also pointed to a range of other threats, including espionage by China and the radicalisation of Poland's youth.
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