US President Donald Trump alleged on Wednesday that there had been "surprise ballot dumps" in states where he had been leading Democrat Joe Biden in the race for the White House.
"Last night I was leading, often solidly, in many key States, in almost all instances Democrat run & controlled," Trump tweeted. "Then, one by one, they started to magically disappear as surprise ballot dumps were counted."
Trump did not offer any evidence for his allegation of "ballot dumps" and there have been no reports of any irregularities.
The leads in numerous states have shifted back-and-forth between the candidates as votes are counted.
Trump, who overnight prematurely declared himself the winner of Tuesday's election, has spent months denouncing mail-in ballots, making unsubstantiated claims that they are liable to fraud.
"How come every time they count Mail-In ballot dumps they are so devastating in their percentage and power of destruction?" he tweeted on Wednesday.
The usage of mail-in ballots soared this election amid the coronavirus pandemic and the US Elections Project said a record 65.2 million US citizens voted by mail.
Within 15 minutes, Twitter had labeled the tweet as "misleading." The company had also taken a similar action against an earlier tweet by the president.
Users were able to read the tweets after clicking through a warning that "some or all of the content shared in this Tweet is disputed and might be misleading."
Meanwhile, Biden vowed Wednesday that his campaign would not "rest until every vote is counted" in the US election after Trump sought Supreme Court intervention to halt the counting process.
"We won't rest until everyone's vote is counted," Trump's Democrat rival said on Twitter.
The Biden campaign team also said that the president would face a loss if he fights the result of the election in Supreme Court.
Trump "will be in for one of the most embarrassing defeats a president ever suffered before the highest court in the land" if he asks it to invalidate ballots counted after Election Day, said former White House counsel Bob Bauer.