The Yantar has entered UK waters for the second time in a year, John Healey said.
The Russian spy ship Yantar is operating on the edge of UK waters and has directed lasers at pilots of surveillance aircraft monitoring its activities, the Defence Secretary has said.
John Healey said Britain “is ready” if the ship heads south in a warning to Russian President Vladimir Putin.
The vessel, designed for gathering intelligence and mapping crucial undersea cables, is off the northern coast of Scotland, having entered wider UK waters over the last few weeks.
Mr Healey told a press conference on Wednesday: “We deployed a Royal Navy frigate and RAF P-8 planes to monitor and track this vessel’s every move, during which the Yantar directed lasers at our pilots.
“That Russian action is deeply dangerous. And this is the second time this year that this ship, the Yantar, has deployed to UK waters.
“So, my message to Russia and to Putin is this: We see you. We know what you’re doing. And if the Yantar travels south this week, we are ready.”
He also said: “It is part of a Russian fleet designed to put and hold our undersea infrastructure and those of our allies at risk.
“It isn’t just a naval operation. It’s part of a Russian programme driven by what they call the Main Directorate of Deep-Sea Research, or GUGI, and this is designed to have capabilities which can undertake surveillance in peacetime and sabotage in conflict.”
