The theft took place in northern Paris as the motorcade was making its way from the Saudi embassy to an airport in Le Bourget, said police, who confirmed there were no injuries.
The attack took place late on Sunday around Porte de la Chapelle in northern Paris, a police source said.
The car attacked was a supply vehicle that was stolen and later found burned, this source added.
No suspects have yet been apprehended.
According to the local daily Le Parisien, the men also stole documents said to be "sensitive".
"It's quite an unusual attack. They were obviously well-informed. It's true that it's quite a rare way of operating," the police source told AFP.
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He must have been on his way to make a humanitarian contribution to one of his favourite terrorist organisation
250,000 euros ?.............must be fake Saudi Prince.
Who is that idiot who carried $250,000 in cash ????
I guess the "sensitive" documents are more related to personal nature than political nature