German Chancellor Angela Merkel's party has suffered its worst-ever result in regional elections in the city-state of Hamburg, exit polls suggest.
The conservative CDU is suffering a leadership crisis after party leader Annegret Kramp-Karrenbauer announced her resignation earlier this month.
The Greens made big gains, while the centre-left SPD is set to remain the largest party.
The far-right AfD may fail to win any seats, if it polls less than 5%.