US President Donald Trump has accused Democrats of voting “shenanigans” as the result from Tuesday’s White House election hangs in the balance.
His Democratic challenger Joe Biden earlier appealed for calm as the nail-biting count drags on in five states.
While clinging to wafer-thin leads in Nevada and Arizona, Mr Biden has been chewing into the Republican president’s edge in Pennsylvania and Georgia.
The cliff-hanger follows one of the bitterest campaigns in living memory.
The election is projected to have generated the highest turnout since 1900. Mr Biden has so far pulled in well over 73 million votes, the most ever for a US presidential candidate. Mr Trump has drawn almost 70 million, the second-highest tally in history.