(CNN) — Emergency crews from a host of government agencies were working through the night to clean up a 2,000-gallon diesel spill along part of Baltimore’s waterfront that started Wednesday morning.

The spill is near the East Harbor Marina in the Patapsco River and originated from a Johns Hopkins Hospital facility in East Baltimore, authorities said .

A spokesperson for Johns Hopkins told CNN the spill was caused by two diesel tanks being overfilled and that it notified the Maryland Department of Environment immediately.

“On Wednesday, during routine fuel delivery by a third-party vendor, two diesel tanks which supply power for backup generators for our patient care facilities at Johns Hopkins in East Baltimore were accidentally overfilled causing overflow,” the spokesperson said.

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