Already on heightened alert, New York City police received a “credible” threat Tuesday that gang members are targeting two precincts near where Officers Rafael Ramos and Wenjian Liu were killed.

According to the Sergeants Benevolence Association, the gang known as the Black Guerrilla Family threatened to “storm” the 79th and 81st Precincts and “shoot it out” with police, Pix 11 News reported.

The SBA, a group of approximately 12,000 active and retired sergeants of the New York Police Department, posted a tweet that detailed the threat, as seen here:

Important info re credible attack from a CI: Black Guerilla Family to storm the 079/081 Pct Station Houses & shoot it out with MOS. — SBA (@SBANYPD) December 24, 2014

With the streets full of protesters, security has been beefed up at the precincts, Fox News correspondent Lea Gabrielle reported Wednesday morning on “Fox and Friends.”

As police take on a near-siege mentality, former NYC police Commissioner Rae Kelly appeared on “Fox and Friends” and said it’s a tough time for officers.

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“It’s a difficult time, but the department has gone through these things through the years,” Kelly said.

He was also highly critical of Mayor Bill de Blasio for saying he warned his biracial son to be careful around police.

“Words matter,” Kelly said. “You don’t say that when you’re mayor of all the people.”

Watch the report here via Fox News: