An anonymous letter found in the mailboxes of a Connecticut police station demanded for "white power" and stated that African American cops "belong in the toilet."

The twist? It was written on Bridgeport police department's official letterhead, creating a possibility that the racist letter was penned by a police officer, CNN reported.

"Something like this coming through the police department, it just never should have happened," Detective Herald Dimbo said in a news conference on Wednesday morning. "This type of behavior affects a minority and spreads racism and hatred throughout the Bridgeport Police Department as well as the community."

"If it came from the outside, we'd think, 'OK, people really don't like police.' But coming from inside, there are no words to be said," Dimbo said, adding that some officers are afraid for their safety after the letter went out.

Earlier this week, the printed memo was discovered to have been stuffed inside the mailboxes of several officers, as well as an internal mailbox that is accessible only to cops at the 394-member police department, WNBC reported.

The Bridgeport Police Department is made up of 27 percent Hispanics and 15 percent blacks.

Specifically, the offensive rant singled out Clive Higgins, an officer who was recently acquitted for a 2011 police brutality case in which cops beat a suspect and shot him with a stun gun -- all while on camera. Two other officers, one Hispanic and one white, were also convicted.

"The Chief promise us the White People, he doesn't belong here," the grammatically challenged writer said.

"You better watch your back... We know where you live. Your face was all over the newspaper. Remember you have no duty weapon to defend yourself."

Following the incident, the letter was flagged to authorities by a police organization for minority officers, The Bridgeport Guardians, according to New York Daily News.

"If the person spewing this hate is a police officer, what is he doing in the community?" asked Thomas Bucci, an attorney representing the Bridgeport Guardians.

"The bottom line is that we have the most diverse police department in the state. We've launched an aggressive recruitment effort in order to make the department even more representative of our community. And, our crime rate is at historic lows. Any allegation of racial discrimination that seeks to divide our police department or our community will not be tolerated," said Brett Broesder, a spokesman for Bridgeport Mayor Bill Finch.

"Swift, fair, just and immediate action will be taken against those guilty of wrongdoing," a statement from the city said, adding that the incident was being investigated by the state police.

Meanwhile in 1978, the Bridgeport Guardians sued the police department for discrimination, and a federal judge later determined that the department had discriminated against its minority officers, the Hartford Courant reported.