Poland pulls 100 tonnes of dead fish from Oder river after mystery mass die-off

More than 500 firefighters deployed to haul in dead fish, using dams, boats, quad bikes and even a drone

Polish firefighters have recovered 100 tonnes of dead fish from the Oder river running through Germany and Poland, deepening concerns of an environmental disaster for which no cause has yet been identified.

We'd never had an operation of this scope on a river before," said Monika Nowakowska-Drynda from the national firefighter press office on Tuesday.