GARDEN CITY, N.Y. (CBSNewYork) — Nassau County Police are investigating yet another incident of hateful vandalism at Nassau County Community College.

Police responded to Nassau County Community College Friday evening after a student notified security that he discovered multiple swastikas along with the words “Germany” and “Heil Hitler” drawn with a black marker inside a men’s restroom.

A reward for information is being offered as police also  investigate four previous incidents of bias graffiti at Nassau Community College that investigators called “reprehensible.”

Police said a security guard found swastikas drawn in a stairwell and on a wall Wednesday while the other graffiti, which included swastikas and anti-Semitic statements, was found in men’s bathrooms on three separate occasions in October.

“In all of these instances, an unknown individual took a black or a blue magic marker and displayed swastikas between three inches and five inches in diameter,” Nassau County Lt. Det. Richard LeBrun said. “The individual who did this is absolutely misguided.”

Most students seemed surprised by the news.

“It’s sad it’s happening right now,” one student told WCBS 880’s Marla Diamond.

“I think it’s not OK,” another student said. “It shouldn’t be like that.”

LeBrun said overall, bias crimes are down 21 percent in Nassau in 2016. But Robert Solomon, chairman of the Jewish Community Relations Council of Long Island, sees a frightening trend.

“I think we have to connect the dots here,” he said. “There are dangerous winds of hate blowing across America.”

Nassau County Crime Stoppers is offering a $5,000 reward for information that leads to an arrest, Diamond reported.

Anyone with information is asked to call Nassau County Crime Stoppers at (800) 244-TIPS.