Divers of the Montenegrin Centre for Underwater Demining have pulled out over 400 World War II grenades from the Zeta River.
On Wednesday, swimmers in the Podgorica suburb of Rogami found an unexploded mine on the Zeta River beach and informed the police.
Divers arrived immediately but instead of disposing of just one mine they found as many as 400 grenades weighing over two tons.
According to the Podgorica media, the bombs date from World War II, and over 90 per cent of them are still active.
Danilo Mijalovic from the Centre for Underwater Demining says that Zeta's confluence with the Moraca River will undergo a security check as it is believed that there are more grenades in the two kilometres long area.
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