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

An oil spill was detected on the Muddy River in Boston Sunday afternoon, police said, leaving some animals residing on the river coated in oil. On Sunday, Brookline Police said in a Facebook post that officers were dispatched to calls of a possible oil leak around noon.

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