A hand grenade was pulled from the river in Leeds by a magnet fisher, prompting a huge police response.
The incident, close to Asda House along the River Aire, was reported shortly after 12.30pm on November 17.
Bomb disposal experts from the army were deployed to deal with the situation. They carried out a controlled explosion.
By around 3.30pm, the scene was clear with only the remains of crime scene tape left tied to the railings in the shadow of Bridgewater Place.
