European spy chiefs warn Moscow is planning more decisive action against Nato

Exclusive: Intelligence officers say Russian campaign could intensify in months, not years' - but that panic risks playing into Kremlin psy-ops

European intelligence officials have raised the possibility of an imminent Russian test of Nato, with one saying a potential attack could come in a matter of months, not years".

The warnings come after Poland's prime minister, Donald Tusk, told parliament that intelligence assessments suggested Russia might launch an attack with drones or missiles on Nato territory in the coming months, as part of efforts to prove that article 5 is more theoretical than practical".