Russian President Vladimir Putin speaks during a joint news conference with his Finnish counterpart Sauli Niinisto following their meeting at the Bocharov Ruchei state residence in the Black Sea resort of Sochi, Russia August 22, 2018. Pavel Golovkin/Pool via REUTERS

MOSCOW (Reuters) - Russia is preparing for President Vladimir Putin to visit Saudi Arabia after he received an invitation from Saudi King Salman, agencies cited Deputy Foreign Minister Mikhail Bogdanov as saying on Friday.

The visit will happen at a time depending on Putin’s schedule, Bogdanov was quoted as saying. He did not say what the talks in Saudi Arabia might touch upon or when Riyadh’s invitation to Putin was made.

Russia and Saudi Arabia, which is a close Middle Eastern ally of the United States, have cooperated closely on global oil markets to curb production between OPEC and non-OPEC countries.

In October 2017, King Salman became the first Saudi monarch to visit Russia, meeting Putin in the Kremlin.

In July, Saudi Crown Prince Mohammed bin Salman shared a box with Putin at the opening match of Russia’s soccer World Cup.

“The visit is being worked on, the timing will depend on the president’s schedule,” Bogdanov was quoted as saying by TASS.

He did not say when the visit would happen.

“It’s the presidential administration’s prerogative, but I think a visit will logically follow. The president has an invitation from King Salman,” he was quoted by RIA as saying.