Checkpoint (1956)

Shattering explosions destroy an Italian car factory and five people are killed. It has been engineered by O'Donovan, who has stolen blueprints on behalf of Warren Ingram, a multi-millionaire who owns a fleet of racing cars. Ingram, against violence of any kind, is aghast at the havoc. Ingram is now faced with the problem of getting O'Donovan out of the country.