Hillary Clinton

With the majority of votes counted, Mr Trump looks set to extend his lead over rivals Ted Cruz and John Kasich.

Meanwhile Democratic hopeful Mrs Clinton, a former senator for New York, is on course for a resounding victory over Brooklyn-born Bernie Sanders.

Wins will put Mrs Clinton and Mr Trump closer to securing their nominations.

With almost 95% of the results in, Mr Trump is leading with just over 60% of the vote while Mrs Clinton has just under 58%.

New York primary results

She got 78 percent of the votes, while her rival, Bernie Sanders, could only manage 21.

The win propels Mrs Clinton into this week's crucial "Super Tuesday" voting in 11 states on a wave of momentum.

"Tomorrow this campaign goes national," she told cheering supporters.

Mr Sanders has congratulated her but said the campaign was just beginning.

With almost all the votes counted Mrs Clinton leads Mr Sanders by an almost 50-point margin.

Eight out of 10 black voters backed Mrs Clinton, exit polls suggested, a key section of the Democratic electorate.