Polling stations closed yesterday in six US states in the bitterly contested election between Democratic Vice President Kamala Harris and Republican former president Donald Trump, including in the key battleground of Georgia.

Polling places also closed in Indiana, Kentucky, South Carolina, Vermont and Virginia in a landmark contest that saw tens of millions of Americans cast their ballots early.

US networks projected Trump as the winner in Indiana and Kentucky, and Harris the victor in Vermont.

The United States was in for a long night of waiting for results, which may be known overnight, or not for days.

Polls were to close throughout the evening, until the last votes are cast in Alaska.