OPINION OF THE COURT
Memorandum.
The order of the Appellate Division should be affirmed, with costs.
The central question on this appeal is whether the City satisfied its duty of care to plaintiff, while in custody, to protect him from self-inflicted harm. Both parties acknowledge that a duty of care is owed by prison authorities with respect to the health and safety of their charges (see, e.g., O’Grady v City of Fulton, 4 NY2d 717, affg 4 AD2d 743). When prison authorities know or should know that a prisoner has suicidal tendencies or that a prisoner might physically harm himself, a duty arises to provide reasonable care to assure that such harm does not occur. Neither the requisite knowledge nor the lack of proper supervision was shown here. Although plaintiff exhibited boisterous, irrational and delusional behavior — and consequently was placed alone in a bare cell, without belt or shoelaces, with a correction officer seated directly outside his cell monitoring him — neither the City’s information nor the plaintiff’s actions prior to the moment he suddenly scaled the bars of his cell and plunged head first into the toilet bowl gave notice to the City that he might harm himself in any such fashion.
We have no quarrel with the statement of applicable law set forth by the dissent, but reach the opposite conclusion when that law is applied in this case. We agree with the Appellate Division that, as a matter of law, the actions taken with regard to plaintiff were reasonable under the circumstances and that every possible precaution had been taken to guard against what was reasonably foreseeable. The dissent concludes that the jury could reasonably have found that, in the moments in which the relevant events unfolded, this plaintiff should have been physically immobilized or restrained until he received medical attention. However, the undisputed evidence that boisterous, irrational behavior (including climbing the bars of the cell) is not uncommon in holding pens and would not itself warrant medical attention, together with the other undisputed evidence — for example, plaintiff’s stated intention to feign insanity, his apparent normality shortly before the incident, the absence of any knowledge on the part of the City of a suicidal history, the routine removal of belts and shoelaces, the confinement of plaintiff alone in a bare cell monitored by a correction officer — lead us to affirm the conclusion below that there was no prima facie case of negligence against the City.
Finally, we address the additional argument made by the City. The City notes the unfortunate reality that many persons in custody may exhibit bizarre behavior, rendering it difficult for prison authorities to guard them from each other