All lines have now reopened on Greater Anglia trains between Diss and Norwich.
A1066 Park Road closed in both directions due to building fire at house fire between B1077 Denmark Street and Mere Street.
Police have confirmed the package discovered in the Royal Mail delivery office in Diss this morning is no longer being treated as suspicious.
Explosive Ordnance Disposal officers from the MOD attended the scene and have confirmed the package is a genuine parcel.
The exclusion zone has been lifted and nearby roads re-opened.