Bernie Sanders has swept to victory over Hillary Clinton in all three states that voted for the Democratic presidential nominee on Saturday.

The biggest prize was Washington state, but Sanders also won in Alaska and Hawaii, boosting his campaign.

He was estimated to have taken more than 70% of the vote in all three.

Sanders thanked his supporters and said his "campaign has the momentum", but he still faces a tough task to overhaul Mrs Clinton.

She went into Saturday's votes leading Mr Sanders by 1,223 delegates to 920.

When superdelegates - party officials who can support either candidate - who have so far declared their allegiance are included, Mrs Clinton was ahead by 1,692 to 949 in the race to reach 2,383 delegates.

Bigger battles ahead

Washington was the most significant of the three states voting on Saturday, with 101 delegates up for grabs. There were 16 delegates on offer in Alaska and 25 in Hawaii.

Sanders was projected to have won 72% of the vote in Washington against 27% for Clinton.

US TV networks gave him about 79% of the vote in Alaska, against 21% for Clinton. In the Hawaii caucus Sanders won by 71% to 29%.

(BBC)