Democratic candidate Joe Biden has pulled ahead of Donald Trump in Pennsylvania, a key state in the US presidential race, results data show.

Mr Biden is leading by more than 19,500 votes, with 98% counted. If he takes the state, he will win the election.

Earlier, Mr Biden edged ahead of his Republican rival in Georgia, another important battleground state, where a recount will now be held.

Meanwhile, the Trump campaign said: “This election is not over.”

Mr Biden is expected to address the nation from his campaign headquarters of Wilmington, Delaware, on Friday evening about his growing leads. His team is monitoring news networks to see whether they will declare him the winner.

If the Democrat is declared the victor this weekend, the transition process is expected to begin on Monday.

What’s the current state of the race?

Mr Biden is leading Mr Trump by more than 4 million votes out of a record 145 million cast.

But US presidential election results are decided on a state-by-state basis in the Electoral College, and the contest is much closer in the key battlegrounds.

Mr Biden has 253 Electoral College votes, while Mr Trump has 214. To win the White House, a candidate needs 270.

Some news organisations have a higher tally for Mr Biden, having projected a win for the Democrat in Arizona.

Pennsylvania, where Mr Biden was born, has 20 Electoral College votes. If the Democrat wins it, he would secure the victory with 273 votes.