In a statement released this morning (28 February), the lines said they will advise guests of the changes "as soon as possible".
"In light of the current situation with Russia and Ukraine, we will be amending itineraries on Baltic cruises," they added.
"Our top priority is compliance, environmental protection and the health, safety and well-being of our guests, crew members, shoreside employees and the people in the places we touch and we will advise guests of the changes as soon as possible."