Last of escaped monkeys accounted for and three euthanised after crash in Pennsylvania

Three of the monkeys that escaped from a truck after it crashed on a Pennsylvanian highway have been euthanized.

The Pennsylvania Game Commission and other agencies launched a search for one of the monkeys that escaped after a collision between a pickup truck and dump truck on Friday.

The cynomolgus macaques were accounted for and three of them were euthanized, according to an email from the Centers for Disease Control and Prevention.

The email didn't say why the three were euthanized or how they were accounted for. Those who were euthanized were done so with care.

Police said the shipment of monkeys arrived at New York's Kennedy airport on Friday morning.

cynomolgus monkeys are often used in medical studies, but the location of the facility and the type of research for which the monkeys were apparently destined weren't clear. A paper posted on the website of the National Center for Biotechnology Information stated that they were the most widely used primate.

Police earlier urged people not to look for or capture a monkey.

Lauren Lesher said the concern was due to it not being a domesticated animal and being in an unknown territory. It is difficult to say how they would respond to a human approaching them.

Animals were scattered across the highway after the crash. Jimmy May/AP

There was a collision on a state highway near an interstate exit.

The drivers of the trucks weren't hurt and a passenger was taken to a medical centre for treatment of suspected minor injuries according to the state police's crash report.

The road was littered with crates as troopers searched for the monkeys. Firefighters and a helicopter tried to locate the animals.