LONDON, July 5 (Reuters) - Insurers are nervous that militant attacks or AI-generated fake images could derail the Paris Olympics, risking event cancellations and millions of dollars in claims.

Insurers faced losses after the 2020 Tokyo Olympics were postponed for a year due to the COVID-19 pandemic.

Since then, wars in Ukraine and Gaza and a spate of elections this year, including in France, have driven up fears of politically-motivated violence at high-profile global events.

The Olympics take place in Paris from July 26-Aug 11 and the Paralympics from Aug 28-Sept 8.

German insurer Allianz is insurance partner for the Games. Other insurers, such as the Lloyd's of London market, are also providing cover.

"We are all aware of the geopolitical situation the world is in," said Eike Buergel, head of Allianz's Olympic and Paralympic programme.

"We are convinced that the IOC (International Olympic Committee), Paris 2024 and the national organising committees, together with the French authorities, are taking the right measures when it comes to challenges on the ground."

The possibility of Islamist attacks are the top security worry for the Games, the Paris chief of police said last month.

"It's such a large event ... in a very large city, which in itself is quite difficult to police," said Andrew Duxbury, head of contingency at insurer Beazley.

France has said it would move its opening ceremony from the River Seine if a specific security risk was confirmed.

A man was arrested in May in the French town of Saint-Etienne, suspected of planning an attack in the name of Islamic State at the city's soccer stadium during the Olympics.

Adam Carrier, head of consulting at crisis management consultancy AnotherDay, said such incidents "demonstrate that the threat against the Paris Olympics is real and ongoing".

Insurers met the IOC in Paris last month to discuss risk mitigation measures, two industry sources told Reuters.

Risk management was an "essential" part of the IOC's work, reducing the likelihood that unexpected events would adversely affect the Games, the IOC said in an emailed statement to Reuters.

FLASHPOINT

Another flashpoint could be the Israeli team, insurance sources said. Israel will participate in the Games despite its military conflict in Gaza, in which 38,000 Palestinians have been killed.

Marcos Alvarez, managing director for insurance ratings at Morningstar ( MORN ), said an attack leading to loss of life, property damage and business interruption could "add several billions" to estimates of $3 billion in insurance losses if the Tokyo Olympics had been cancelled due to COVID-19.

The IOC buys its insurance several years in advance. It typically buys around $800 million in cover for each Olympic Games.

"Due to confidentiality clauses included in our agreements with our service providers, the IOC cannot disclose terms of its contracts," it said.

"The insurance policy would come into effect under certain unexpected events, as history has already witnessed, to allow IOC to cover part of its operational cost."

The Paris organising committee also buys insurance, as do national organising committees. Broadcasters, sponsors and travel firms are likely to buy their cover around a year in advance, while hospitality providers may buy insurance closer to the event.

Since the 9/11 attacks in New York in 2001, standard event cancellation policies have typically excluded terror attacks, but events organisers and businesses can buy separate cover.

Vulnerable companies can also buy cover against losses incurred by strikes, riots and civil commotion.

France is preparing for the second round of parliamentary elections on July 7, leaving many businesses braced for protests which could lead to property damage.

Edel Ryan, an executive in Marsh's UK sports and entertainment business said AI-based attacks also had the potential to disrupt the Games, "whether that is ticketing or fraud, or manipulating live broadcast feeds".

Olympics organisers would do what they could to reschedule events if necessary, industry sources said, but that was not always easy given the tight schedule, leading to potential cancellations.

"Logistically that would have a nightmare knock-on effect," said Imogen Mitchell-Webb, head of sports at insurance law firm HF. "There is no room to reschedule things."

($1 = 0.9348 euros) (Additional reporting by Karolos Grohmann in Berlin, editing by Sinead Cruise and David Evans)