Joe Biden is now projected to have 284 Electoral College votes, the Associated Press (AP) news agency said on Saturday, above the threshold needed to clinch the hard-fought United States presidential election.

The president-elect was projected to have surpassed the 270 electoral vote-threshold after the AP called Pennsylvania in his favour.

US President Donald Trump did not immediately acknowledge the AP’s projection and his campaign has vowed to challenge the result, particularly in the states of Georgia, Pennsylvania, Arizona and Michigan.

The Republican leader’s campaign announced plans to seek a recount in Wisconsin and filed lawsuits to suspend the vote counts in several states.