Investigation into the attempted bombing of Bank of America's office in Paris.
Suspicions raised about Iranian intelligence services' involvement.
Detention of three teenagers and a 21-year-old man.
The strange foiled attack on Bank of America in Paris: 'He said if the kids pulled off the job, there'd be many more'
Strategic angle: Three teenagers and a 21-year-old man were detained in connection with an attempted bombing linked to Iranian intelligence.