France on Wednesday, July 13 said it had closed its embassy in the Turkish capital Ankara and its consulate in Istanbul until further notice for security reasons, after cancelling events to mark the July 14 Bastille Day holiday, AFP reports.

"The Embassy of France in Ankara, as well as the Consulate General in Istanbul will be closed from Wednesday July 13, 1:00 pm (1000 GMT), until further notice," the embassy said in a statement after scrapping the July 14 receptions at the missions on security grounds.

It did not give any further details on how the closure would be implemented.

France's consulate in Istanbul, its embassy in Ankara and its mission in the Aegean city of Izmir were all to have held celebrations marking the July 14 Bastille Day.

French consul to Istanbul Muriel Domenach wrote on Twitter the events in all three cities had been cancelled "for security reasons" and France was in touch with the Turkish authorities, AFP says.

Earlier, the Istanbul consulate had sent an email message to French citizens in Turkey saying there had been "concurring information of a serious threat against the organisation of the July 14 celebrations in Turkey".

It said the decision had been taken in coordination with the Turkish authorities.

Turkey is on a high security alert following the June 28 attack on Istanbul's main airport which was blamed on Islamic State (IS) jihadists and killed 47 people.

Thirty-seven suspects have been placed under arrest over suspicion of involvement in the attacks. Of these, 15 are Turks and 22 foreigners, according to official media, AFP says.

Authorities have said a number of citizens of ex-Soviet republics are among the suspects, raising concerns over the threat to Turkey from Islamist militancy in the Central Asia and the Northern Caucasus.

But of seven suspects arrested earlier this week, three are Algerian, two Tunisian and two Egyptian, the state-run Anadolu Agency said.