A video that is being widely shared on social media shows a monkey clambering around inside the Port of Spain General Hospital in the Caribbean country.
Filmed on Friday morning, the video has gone viral online with claims that a "big snake" was also found inside the hospital - something that authorities have denied.
According to the Trinidad and Tobago Guardian, the hospital had been planning to resume elective surgeries after a three-month hiatus due to a lockdown in the country to contain the spread of coronavirus.
The presence of the monkey in the operating theatre, however, led to an hour-long delay.