Embassy staff had notified police of the object, triggering a large response from law enforcement, police said.

The device was later detonated in a controlled manner, a police spokesperson told the broadcaster TV4.

Police declined to give any detail on the nature of the object, or of how it had got into the embassy grounds.

The embassy building was cordoned off at a distance of about 100 metres (yards).

The Embassy could not immediately be reached for comment.

(Reporting by Anna Ringstrom in Stockholm and Louise Rasmussen in Copenhagen, editing by Terje Solsvik and Kevin Liffey)