Police on Long Island are stepping up patrols in the wake of a mall shooting near Seattle that left five people dead Friday night.

The Nassau County Police Department “continues to remain on heightened alert” and is “intensifying patrols” throughout the county, according to a news release issued Saturday morning.

No imminent threats are known to officials in Nassau or Suffolk, but police are monitoring mass transit areas as well as critical infrastructure and significant public events.

Suffolk police said in a statement that they are continuing “enhanced deployments of police personnel at shopping malls and other large gathering areas.”

In the releases, Suffolk County Police Commissioner Timothy Sini, Suffolk Police Chief of Department Stuart Cameron, Nassau County Executive Edward Mangano, and acting Nassau Police Commissioner Thomas Krumpter extended their condolences to the victims and families of the shooting at the Cascade Mall in Burlington, Washington.

Suffolk police called the shooting “yet another senseless act of violence” and said their “thoughts are with Washington area law enforcement as they search to bring the suspect involved in this shooting to justice.”

Police ask the public to call 911 immediately if they see any suspicious activity or items or packages. Suspicious social media activity can be reported through Text-a-Tip via the Nassau County Crime Stoppers app.

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In Suffolk, police encouraged businesses owners to sign up for the department’s counterterrorism and anti-crime program, SCPD Shield, at SCPDShield.org. The program “fosters information sharing and awareness regarding national, regional and local criminal activity and counter-terrorism issues,” including timely information with public safety alerts, crime pattern notifications, recommended responses and training opportunities, a police spokeswoman said in a statement.

Police in Burlington, Washington, continued to search Saturday for a gunman authorities said opened fire in the makeup department of a Macy’s store at a mall north of Seattle, killing four females and one man, before fleeing toward an interstate on foot, The Associated Press reported.

People fled, customers hid in dressing rooms and employees locked the doors of nearby stores after gunshots rang out just after 7 p.m. Friday at the Cascade Mall.

A helicopter, search teams and K-9 units scoured the area for a rifle-carrying man.

“We are still actively looking for the shooter,” a Washington State Patrol spokesman, Sgt. Mark Francis, said at a news conference.

With The Associated Press