Efforts to flush out Baltimore City’s storm drain system after an oil spill Wednesday leaked 5,000 gallons of diesel fuel into the Baltimore Harbor have been effective, says the U.S. Coast Guard.

Many of the large pools of diesel fuel, noticeable by its distinct red color from dye, have been removed from Baltimore's harbor two days after a 2,000-gallon spill.

Officials say crews are working to contain and clean up a 2,000-gallon diesel fuel spill in Baltimore’s harbor.