LIMA, Peru (AP) — President Barack Obama spoke briefly with Russian President Vladimir Putin about Syria and Ukraine on Sunday as an economic summit got under way in Peru, in their first known conversation since Donald Trump was elected the next US president.

The two leaders were seen chatting at the start of the opening session of the Asia-Pacific Economic Cooperation summit in Lima. They stood off to the side together momentarily with aides close by before shaking hands and then taking their seats around a table.

Read: Obama, Russia’s Putin meet at economic summit in Peru

The White House said the conversation lasted four minutes.

Although reporters present couldn’t hear what they said, the White House said Obama encouraged Putin to uphold his country’s commitments under the Minsk deal aimed at ending the Ukraine conflict. Both the White House and the Kremlin said the leaders had agreed that U.S. Secretary of State John Kerry and Russian Foreign minister Sergei Lavrov should keep working throughout Obama’s final months on initiatives lower violence in Syria and alleviate suffering.

The short interaction came amid intense speculation and concern about whether Trump’s election might herald a more conciliatory US approach to Russia. Under Obama, the U.S. has enacted severe sanctions on Russia over its aggressive behaviour in Ukraine and has sought unsuccessfully to persuade Moscow to stop intervening in Syria’s civil war to help prop up Syrian President Bashar Assad.

Trump and Putin have already signalled they may pursue a less antagonistic relationship after Trump takes office in January. In a phone call shortly after Trump was elected, Putin congratulated him and expressed readiness for a “partner-like dialogue,” the Kremlin said.

In the run-up to the election, the US also accused Russia of trying to interfere in the election, including by hacking into Democratic Party email systems. Obama has raised concerns directly to Putin ahead of the election about Russian hacking, and the US also registered complaints through a hotline set up to avert accidental nuclear war.

Throughout the campaign, the Kremlin insisted that it had no favourites and rejected the claims of interference in the US election.

The meeting came on Obama’s final day in Peru, his last stop on his final overseas tour as president.