Wildlife rescuers were rushing to tend to dozens of geese and ducks that were soaked in oil after an apparent spill in a Boston river

The Boston Fire Department also responded to the leak, according to the post. Police said that the exact location of the leak and the reason for the leak is still unknown. Various Canadian geese and ducks have been affected by the oil leak, police said. New England Wildlife responded to the scene to help with treatment for the animals.

As of Sunday night, wildlife officials had taken in 15 to 20 birds impacted by the Muddy River oil spill, according to MassDEP.