Mystery parcel fires were 'test runs' to target cargo flights to US, says Poland

The attacks targeted couriers in Poland, Germany and the UK, Polish prosecutors say.

Mystery parcel fires were 'test runs' to target cargo flights to US, says Poland

Mystery parcel fires were 'test runs' to target cargo flights to US, says Poland

Mystery parcel fires were 'test runs' to target cargo flights to US, says Poland

Mystery parcel fires were 'test runs' to target cargo flights to US, says Poland

Mystery parcel fires were 'test runs' to target cargo flights to US, says Poland