There are no plans for Donald Trump and Vladimir Putin to meet in person in the near future, according to a White House official.
The presidents last week agreed to meet in Budapest after a phone call Mr Trump called "extremely frank and trustful".
The US leader suggested it was possible it could happen within a fortnight, though no date was set.
However, it appears that's now off the table - and there are fears the meeting could be shelved altogether due to Russia 's rigid stance on the Ukraine war.
The White House official, speaking to Sky's US partner network NBC, said secretary of state Marco Rubio and Russian foreign minister Sergei Lavrov had spoken on Tuesday.
The call was described as "productive" but the official added there was no plan for the presidents to m