US President Donald Trump and Russian counterpart Vladimir Putin plan to meet in Paris next month, amid a continuing dispute over a key nuclear arms treaty.

The pair will meet at World War One centenary commemorations, US National Security Adviser John Bolton said.

He was in Moscow to convey US plans to withdraw from the 1987 Intermediate-Range Nuclear Forces (INF) treaty.

Russia denies US claims it has breached the treaty and warns that withdrawal is a "dangerous step".