FRANCE has summoned the US ambassador to protest over claims of large-scale spying on French citizens by the US National Security Agency (NSA).

Allegations by Le Monde newspaper that the agency was collecting tens of thousands of French telephone records risked turning into a diplomatic row just as US Secretary of State John Kerry arrived in Paris for the start of a European tour about Syria.

French Foreign Minister Laurent Fabius said: "I have immediately summoned the US ambassador."

Earlier, France's interior minister, Manuel Valls, said the revelations 70.3 million pieces of French telephone data were recorded by the NSA were "shocking".

He added: "If an allied country spies on France or spies on other European countries, that's totally unacceptable."

US Ambassador to France Charles Rivkin declined immediate comment on being summoned by the French foreign ministry but stressed US-French ties were close.

In July, Paris prosecutors opened a preliminary inquiries into the NSA's programme after allegations of wide-scale spying by the agency were leaked by former NSA contractor Edward Snowden.