Mali's Foreign Minister Abdoulaye Diop said he had spoken with his Spanish counterpart after a row over comments the Spaniard made about the possibility of a NATO operation in the African country.

Diop wrote in a tweet that he had spoken by phone with his Spanish counterpart Jose Manuel Albares about the comments, which were made in a radio interview.

"He denied the remarks and expressed his attachment to friendly relations and cooperation with Mali," wrote Diop.

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Spain moved to calm the row on Saturday, a day after the military regime in Bamako had summoned their ambassador for an explanation.

"Spain did not ask during the NATO summit or at any other time for an intervention, mission or any action by the Alliance in Mali," said a statement from Spain's embassy.

The row blew up over remarks by Albares in an interview on June 30 with Spain's RNE radio station.

Asked if a NATO mission in Mali could be ruled out, Albares replied, "No, we can't rule it out. It hasn't been on the table at the talks in Madrid because this is a summit that is laying out, so to speak, the framework for NATO action.

"If it were necessary and if there was to be a threat to our security, of course it would be done," he added.

Albares was speaking on the sidelines of the NATO summit as it drew to a close in Madrid.

'Unacceptable remarks'

Diop had told state broadcaster the Office of Radio and Television of Mali (ORTM) on Friday that Bamako had summoned the Spanish ambassador to lodge a strong protest over the remarks.

"These remarks are unacceptable, unfriendly, serious," said Diop, because "they tend to encourage an aggression against an independent and sovereign country."

"We have asked for explanations, a clarification of this position from the Spanish government," he added.

At the Madrid summit, Spain pushed hard to prioritize the topic of the threat to NATO's southern flank caused by the unrest in the Sahel - the vast territory stretching across the south of Africa's Sahara Desert, incorporating countries including Burkina Faso, Chad, Mali, Mauritania and Niger.

Armed attacks by militants there are pushing increasing numbers of people to flee north towards Europe, with Spain one of the main points of entry.

At the summit, NATO acknowledged the alliance's strategic interest in the Middle East, North Africa and the Sahel.

Mali has since 2012 been rocked by militant insurgencies. Violence began in the north and then spread to the center and to neighboring Burkina Faso and Niger.