A journalist from German broadcaster Deutsche Welle says Angela Merkel has broken her pelvis in a skiiing accident.
GroKo is short for "grosse Koalition", a grand coaliton of the two large camps from centre-left and centre-right within German politics.
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The wintry theme continues.
Violent clashes between police and protesters erupted in Athens ahead of a farmers protest against pension cuts.
A coroner has ruled a "series of failures" contributed to the death of a newborn.