Nassau police stepped up security for a graduation ceremony Tuesday night at the Nassau Coliseum following the terror attack in Manchester, England. 

The Greater Manchester police confirmed the man suspected of carrying out the attack is 22-year-old Salman Abedi, who police believe detonated an explosive device he was carrying near one of the venue exits at Monday's Ariana Grande concert. A total of 22 people died in the attack. 

Along with the caps and gowns, Nassau Community College graduates were surrounded by extra police at the ceremony. Nassau police compared the deployment of the officers as a bit of a chess game.

They told News 12 that SWAT teams would switch from a crime prevention patrol to a tactical vigilance patrol -- all based on gathered intelligence.

The NYPD said it is also stepping up patrols following the Manchester attack. The NYPD said people can expect to see so-called heavy weapons teams stationed in major sites throughout the city.

Rep. Peter King said officers are working 24/7 to keep the metro area safe, adding that much of the security is done undercover.

"In New York and Long Island, there are measures that are being taken at every large event that no one even knows about. Very sophisticated," he told News 12. 

Nassau police said there will also be increased patrols at this weekend's air shows at Jones Beach. State police, as well as members of park police, will be at the event.