NYPD officers hospitalized after bleach found in Shake Shack milkshakes

The officers were taken to Bellevue Hospital to get checked out, and have since been released.

Police sources said that the incident was unintentional and appeared to have been caused by the cleaning solution used on the shake machine not being sufficiently cleaned off, according to the New York Post.

“After a thorough investigation by the NYPD’s Manhattan South investigators, it has been determined that there was no criminality by shake shack’s employees,” Chief of Detectives Rodney Harrison tweeted early Tuesday morning.

Though all three are assigned to the 42nd Precinct in The Bronx, they were on duty in Manhattan at the time.

An immediate investigation was launched by the NYPD's Crime Scene Unit.

Investigators were able to recover two of the cups that officers had tossed after they attempted to drink the shakes.

Shake Shack responded to Harrison's tweet about the incident, tweeting: "Our team is working hard to get the full picture. In the meantime, we're relieved to hear the officers are all okay."

The Police Benevolent Association (PBA) noted in a warning letter to police officers that this incident was "yet another serious safety issue."

PBA President Patrick Lynch wrote that the officers who had been assigned to a protest stopped at the Shake Shack.

“At some point during their meal period, the (officers) discovered that a toxic substance, believed to be bleach, had been placed in their beverages,” he wrote.

“The contamination was not discovered until the (officers) had already ingested a portion of their beverages,” Lynch added. “They are currently at the hospital receiving treatment and are expected to recover.”

“When New York City police officers cannot even take meal without coming under attack, it is clear that environment in which we work has deteriorated to a critical level," he concluded. "We cannot afford to let our guard down for even a moment."