A letter from the head of a New York police union told officers they were facing a 'verified' threat by a militant prison group and warned cops Saturday to wear bulletproof vests and carry extra magazines. An NYPD spokesperson stated there was not a 'credible, specific threat' after Sergeants Benevolent Association president Ed Mullins warned of an organized action to shoot an on-duty officer. The New York Daily News reports Mullins sent the warning based on information that 10 members of the Black Guerrilla Family planned to shoot an NYPD officer. Warnings: An NYPD spokesperson stated there was not a 'credible, specific threat' after Sergeants Benevolent Association president Ed Mullins warned of an organized action to shoot an on-duty officer
@highlight
A letter from Sergeants Benevolent Association president Ed Mullins claimed there was a threat to shoot an on-duty NYPD officer
@highlight
An NYPD spokesperson stated the threat was related to 'another East Coast City'
@highlight
The organization allegedly responsible,  Black Guerrilla Family, was founded in California in 1966 and currently has a strong presence in Baltimore
'The threat information referenced in a recent news story relates to another East Coast City and does not make reference to @placeholder or its police,' the statement read.