A London surgeon who has provided testimony over the current war in Gaza after operating during the conflict has been denied entry to France, where he was due to speak in the French senate later on Saturday.

After arriving at Charles de Gaulle airport north of Paris on Saturday morning on a flight from London, Prof Ghassan Abu-Sitta, a plastic and reconstructive surgeon, was informed by French authorities that Germany had enforced a Schengen-wide ban on his entry to Europe.

French police said the German authorities, who had previously refused Abu-Sitta entry to Germany in April, had put a visa ban on him for a year, meaning he was banned from entering any Schengen country. It is not clear whether Abu-Sitta was aware of this before flying to Paris.

“They are preventing me from entering France. I am supposed to speak at the French senate today,” said Abu-Sitta, who had been invited by Green party parliamentarians to take part in a conference at the Sénat, the upper house, to speak about Gaza. The theme of the conference was: France and its responsibility in the application of international law in Gaza.