At 23:00, as Forbes was just learning of the incident with Orzeł, Gruppe 5 was confronted by the Norwegian patrol vessel Pol III at the entrance to the Oslofjord.
La 23:00, chiar când Forbes afla de atacul reușit de Orzeł, Gruppe 5 a fost interceptat de vasul de patrulă norvegian HNoMS Pol III la intrarea fiordului Oslo.