Two former zoo keepers will face no further action over claims they mistreated elephants in an enclosure.
Three workers at Twycross Zoo were dismissed and then arrested in connection with mistreating the animals after the zoo reported its concerns to Leicestershire Police last year.
The force handed a file to the Crown Prosecution Service relating to two of the men. No further action was taken against a third.
It was claimed two elephants had been mistreated at the zoo on the Warwickshire and Leicestershire border.
But the CPS has found there is insufficient evidence to prove a criminal offence under the Animal Welfare Act 2006.