Canberra, Feb 24 (IANS): An unexploded World War I grenade was found Tuesday by a fisherman in the Swan river in Australia.
According to officials, the grenade had fins and a bulbous head, but no fuse.
The bomb squad and Navy experts identified it as a 1915 German Wurfgranate.
A spokesman for the Arms and Armour Society with the Army Museum, Barry Lathwell, said it was certainly an unusual find.
"Those WWI devices are very, very rare," he said.
"I would doubt that there are many of those that would have been brought back. They are not very common at all."
"If they are still alive, they are very dangerous. It would have to be deactivated or destroyed by the army," he added.
German Wurfgranates were in use for a relatively short period between 1915 and 1918, due to their rarity.