SOUTHBURY, Conn. — Connecticut officials have closed the swim area at Kettletown State Park due to the presence of blue-green algae blooms in the water.

The state Department of Energy and Environmental Protection said Sunday that the toxic algae blooms, also known as cyanobacteria, started developing at the Southbury park last week. A warning was posted there Friday urging swimmers to avoid areas where there is a green film on the surface of the water.

DEEP says the rest of the park is still open.

Five other swim areas at inland lakes and ponds were closed Friday due to conventional bacteria levels: Gardner Lake in Salem, Gay City in Hebron, Mashamoquet Brook in Pomfret, Quaddick in Thompson and Wadsworth Falls in Wallingford. These areas will be retested for bacteria this week.