TRENTON, N.J. (AP) — New Jersey’s state police union has issued an email alert to the group’s 33,000 members warning them to take extra caution after two NYPD officers were murdered.

New Jersey State PBA Executive Vice President Marc Kovar said in the email Sunday morning that all members and officers should take extra caution and change up routines in the coming weeks.

He cites heightened hostility from nationwide protests that he says has led to a “fever pitch of anti-police sentiment.”

New York police say 28-year-old Ismaaiyl Brinsley killed two officers Saturday after vowing online to shoot two officers in retaliation for the police chokehold death of Eric Garner. Another police officer was shot and killed in Florida Sunday morning.

The union says officers should be alert for any interaction where someone may be looking for a confrontation.

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