US
The two leaders used Tuesday's call to set out their opposing positions on Ukraine
US State Secretary says Moscow has stepped up planning for potential military action in the country
Moscow says simply countering recent US decision, accuses Washington of starting row
NATO, US warn Moscow it would pay a high price for any new military aggression
FM Lavrov says Ukrainian military manoeuvres and use of drones in the country's east poses a threat to Russia
Stoltenberg also warns Russia to ‘de-escalate’ its military build-up on border with Ukraine
France says the deployment is not acceptable because it has its own troops in the region
Official stresses preventing situations from 'spiralling out of control'
US says Biden administration seeks cooperation with Turkey on common priorities
Thousands of people, desperate to flee the war-torn country, continue to throng the airport