German Chancellor Friedrich Merz said Tuesday that Berlin is concerned about the absence of a clear endgame in the conflict involving the United States and Israel against Iran, warning that the fighting has already stretched beyond a week while uncertainty about how it will conclude continues to grow.

After a meeting with Czech Prime Minister Andrej Babiš in Berlin, Merz said the U.S. and Israel have been waging the war for more than a week and that more questions arise with each passing day.

"We are particularly concerned that there is obviously no joint plan on how to bring this war to a swift and convincing end," the chancellor said.

He also called Iran's counterattacks a "dangerous escalation."

The comments came one day after Merz said responsibility for ending the conflict lies with the leadership in Tehran.