Visitors to Edinburgh Zoo were escorted indoors when a bull escaped from its enclosure.
The adult male Heck cattle bull was on the loose for about 40 minutes before it was tranquillised by a team of keepers and vets.
A spokeswoman for the zoo apologised for any inconvenience caused.
"It stayed within the locality of the enclosure," she said.
"Edinburgh Zoo visitors were immediately escorted to indoor areas in the zoo. Edinburgh Zoo's trained team of expert keepers and veterinarians safely and effectively darted the animal.
"Staff are establishing the circumstances of the escape, and have secured the area.
"We regret any inconvenience this caused and our visitor services staff will respond to any queries related to this incident."
Last week, a scarlet ibis was recaptured after escaping from the zoo and evading its keepers for six days.
The rare bird left its enclosure through a hole in the netting on Tuesday August 22 and its bright red plumage was spotted across the capital.
Zookeepers tracked the two-year-old female to the Cramond area last Sunday and tempted the bird into a trap using her favourite food of mussels and prawns.