Chancellor Angela Merkel told her supporters, "This is a super result," after exit polls suggested a triumphant election win for her party.
Projections from German broadcasters ARD and ZDF show a wide lead for Merkel's Christian Democratic Union against challenger Peer Steinbruck's Social Democrats.
Merkel said her party will do "everything" to make the next four years successful for Germany .
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A year ago the International Court of Justice ruled that Japan's decades-old whale hunt in the Antarctic should stop.
Shadow chancellor John McDonnell has backed a free vote for MPs on the issue.
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