Candidates bidding for their party's nomination in the US presidential election face their biggest test yet in the "Super Tuesday" primary polls.
Eleven states cast votes for candidates from either the Republican or Democratic parties or both in a contest seen as make-or-break for the hopefuls.
Contests stretch from Vermont in the east to Texas and Georgia in the south.
Donald Trump leads the Republican field and Hillary Clinton is ahead in the Democratic race.
There have been earlier votes in four states.