A thin-built man in his teens approached a 16-year-old girl Monday in Massapequa and exposed himself, Nassau County police said.

The girl was walking west on North Richmond Avenue when at 6:18 p.m. the man, unknown to her, approached, police said. After the man -- wearing jeans and a black/red shirt and hat -- engaged in the act of public lewdness, she screamed, ran home and called police, police said.

Anyone with information can call Nassau County Crime Stoppers, anonymously, at 800-244-TIPS.

It seems shark sightings are dominating headlines on Long Island and researchers are on a quest to find out why more sharks are showing up in Long Island waters. NewsdayTV meteorologist Rich Von Ohlen discusses how to stay safe.  Credit: Newsday/A. J. Singh; Gary Licker

'Beneath the Surface': A look at the rise in shark sightings off LI shores It seems shark sightings are dominating headlines on Long Island and researchers are on a quest to find out why more sharks are showing up in Long Island waters. NewsdayTV meteorologist Rich Von Ohlen discusses how to stay safe. 

It seems shark sightings are dominating headlines on Long Island and researchers are on a quest to find out why more sharks are showing up in Long Island waters. NewsdayTV meteorologist Rich Von Ohlen discusses how to stay safe.  Credit: Newsday/A. J. Singh; Gary Licker

'Beneath the Surface': A look at the rise in shark sightings off LI shores It seems shark sightings are dominating headlines on Long Island and researchers are on a quest to find out why more sharks are showing up in Long Island waters. NewsdayTV meteorologist Rich Von Ohlen discusses how to stay safe. 

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