ALEXANDRIA — Minnesota health officials are warning of the dangers of toxic blue-green algae after they say a child was taken to a hospital after swimming in a central Minnesota lake that had the bacteria.

The Minnesota Pollution Control Agency and the state Department of Health said the child was swimming in Lake Henry in Alexandria in early June and showed symptoms of toxic algae contact. The child has since been released from the hospital.

Pam Anderson with the Minnesota Pollution Control Agency says it’s not always clear when algae blooms are toxic, so it’s best to stay away if the water has a foul smell.