Biden appeals for patience, says he has 'no doubt' he will win US election

Appealing for patience as votes continue to be counted, Democrat challengerJoe Biden said Thursday he has "no doubt" he will defeat US President Donald Trump and be declared winner of the US election.

The presidential hopeful, 77, called on US citizens to remain patient and said that the result will be known "very soon".

"We continue to feel very good about where things stand. We have no doubt that when the count is finished, Senator [Kamala] Harris and I will be declared the winners," Biden told reporters in his hometown of Wilmington, Delaware.

Biden is leading Trump in the race for the 270 electoral votes that will put one of them over the top, with the Democrat's campaign asserting they believe he has enough votes to win in key battleground states that remain undecided, like Pennsylvania.