Last night someone tried to steal one of above-mentioned cougars, the animal was taken out of exhibit (presumably being sedated?) and found later at zoo grounds, tied to the pole and sleeping.
Due to zoo's large size combined with poor security and poverty, it's not the 1st animal theft:
About 2000: attempt to steal a crowned crane
14.09.2005: 5-months old hand-raised female common marmoset was stolen from monkey house by a boy,15 and seized & returned 2 months later after the thief put it up for sale.
4.01.2007: young Siamese crocodile & 2 red-eared sliders were stolen from reptile house (not found)
11.02.2007: a man was caught in reptile house running away with a large radiated tortoise and having dropped a spur-thighed tortoise (probably he also has stolen the prevoius reptiles). The unlucky bastard harmed his leg while breaking through window
and cases of animals killed by visitors:
Summer 1998: (last?) flamingo killed from a slingshot
November 2006: young llama was found butchered (probably by homeless people)
10.11.2008: 2 boys, 12 with a girl, 11 (all are the filthy offspring of drunk parents) sneaked into kangaroo exhibit, trapped red-necked walabies in their shelter one by one and beaten them with sticks, killing young female in the process (as well as its newborn baby after inspecting the pouch).
The next day they killed 3 seagulls and injured 3 other ones (which died later). Birds couldn't fly away because of clipped wings.
Finally the damn kids were caught by security guard while throwing bottles at pelican. Naturally, they got off the hook (though flogging them until blood flows could be nice!) and all responsibility was laid on their parents.
12.08.2010: 6 white-tailed sea eagles were shot at night. Security guards heard nothing (2 guards for 90-hectare zoo is NOT enough).