The restaurant chain said it was working with police in the investigation.
Officers should carefully inspect any food items they purchase while on duty for possible contamination, he said.
Another police union, the Detectives Endowment Association, initially said they believed employees at the Shake Shack had intentionally poisoned the milkshakes, but soon walked back that assertion.
The officers bought milkshakes from a Shake Shack on Monday night and were later hospitalized after getting sick. "In the meantime, we're relieved to hear the officers are all OK".
The officers, who stopped at Shake Shack for dinner while assigned to work during an anti-racism demonstration overnight, complained of feeling unwell and were taken to a hospital, where they were examined and released, the NYPD said in a statement.
NY is among the major United States cities that have seen mass protests against police brutality and systemic racism since George Floyd died while being arrested in Minneapolis on May 25.
Musk - time for Tesla Semi to get on the road
Apparently, battery production has really ramped up , especially considering that Model Y production just began last quarter. Eventually, the Semi faded from the company's earnings reports altogether.
"When NYC police officers can not even take meal without coming under attack, it is clear that environment in which we work has deteriorated to a critical level", PBA President Patrick Lynch wrote.
The NYPD did not say what may have caused the beverages to sicken the officers.
"We can not afford to let out guard down for even a moment", Lynch warned. The 46-year-old was killed after a former police officer, Derek Chauvin, kneeled on his neck for eight-minutes-and-forty-six-seconds.
About 600 anti-crime unit plainclothes officers have been reassigned to new roles, effective immediately, in a victory for the Black Lives Matter movement and its push for police reform.
Pat Lynch, president of the Police Benevolent Association (PBA) responded to the decision in a statement saying: 'Anti-Crime's mission was to protect New Yorkers by proactively preventing crime, especially gun violence.
The officers were expected to survive.