German Chancellor Angela Merkel will miss the opening of the G20 summit in Argentina after her plane was forced to land in Colonge shortly after leaving Berlin.
Her office says Merkel and delegates made a safe, but unscheduled, landing after the aircraft developed a technical problem.
The plane turned back while it was over the Netherlands, Germany's dpa news agency reported.
The captain announced to passengers that he had decided to turn back after the "malfunction of several electronic systems", Reuters reported.
Merkel will reportedly travel on to Buenos Aires today.
