German magazine Der Spiegel has reported the warning, quoting a leaked note from a recent call between the European leaders

But on a more serious note, we are hearing that German chancellor Friedrich Merz has postponed his planned visit to Norway scheduled for Friday and will travel to Brussels instead.

Merz will travel to Belgium for a private dinner with Belgian prime minister Bart De Wever and European Commission President Ursula von der Leyen, his spokesperson said in comments reported by Reuters.