A chilling scene unfolded Tuesday on a Mississippi highway: a truck carrying research primates overturned, unleashing a wave of small, frightened creatures into the surrounding landscape. The incident occurred just north of Heidelberg, scattering wooden crates marked with a stark warning – “live animals.”
Law enforcement quickly issued a public alert, describing the escaped Rhesus monkeys as “aggressive.” The monkeys, typically weighing around sixteen pounds, are a species heavily utilized in medical research, known for their physiological similarities to humans. The urgency of the warning underscored the potential danger posed by the escaped animals.

Tragically, all but one of the monkeys were struck by vehicles and killed. Images from the scene revealed the animals attempting to navigate the tall grass alongside Interstate 59, a desperate scramble for safety amidst the chaos. The sheer number of monkeys originally in the truck remains unknown.
These primates were en route from the Tulane University National Biomedical Research Center in New Orleans, a facility that routinely supplies research organizations with primates. The destination and the identity of the transporting company remain shrouded in mystery.
A conflicting narrative emerged regarding potential health risks. Initially, the sheriff’s department cautioned about possible diseases, including herpes. However, Tulane University swiftly countered, stating the monkeys posed no infectious threat.
The sheriff’s department then clarified their initial statement, explaining that the truck driver had specifically warned law enforcement about the monkeys’ dangerous nature and the necessity for protective gear when handling them. This discrepancy added another layer of concern to the already unsettling situation.
Authorities, including Mississippi Wildlife and Fisheries, converged on the crash site, approximately one hundred miles from Jackson, to manage the aftermath. The cause of the truck’s overturn is still under investigation, leaving unanswered questions hanging over this disturbing event.