U.S. President Donald Trump criticises NATO after a closed meeting with Mark Rutte, renewing tensions over military alliances and Greenland.

US President Donald Trump met with NATO chief Mark Rutte to address the alliance's support over the Iran conflict and potential troop withdrawals.

The US president previously branded NATO a "paper tiger" for refusing to lead efforts to open the strategic Strait of Hormuz and for limiting US forces from using bases on their territories.