The motive behind Monday’s bombing attack against a Ukrainian-born millionaire in Monaco remains shrouded in mystery as residents of the super wealthy city-state grapple with their suddenly shattered sense of security.

One victim was named by a local news outlet as Vadim Ermolaev - one of Ukraine's wealthiest men - who is understood to have fled the country amid the war with Russia

Two of the victims suffered life-threatening injuries, police said. One of the wounded is Ukrainian oligarch Vadym Yermolaiev, a source said.

Explosion at residence near border with France was ‘very likely an attack’, minister says