Rosa King was "absolutely central" to Hamerton Zoo and loved working with her "beloved cats", friends said.
Police were called to the zoo at 11:15 a.m. Monday.
"Huntingdonshire District Council have a responsibility for health and safety and licensing at the zoo, and are investigating these aspects".
According to Cambridgeshire Police, the incident, deemed a "freak accident" by park officials, is "not believed to be suspicious". Witnesses told The Telegraph that they heard screams and saw other keepers desperately trying to distract the tigers with meat.
Inspectors at Hamerton Zoo found a number of safety features needed improving in 2013.
It includes enclosures for Malaysian tigers, Bengal tigers, cheetahs, wolves, corsac foxes, kangaroos as well as a variety of birds, reptiles and domestic animals.
Tributes have since been paid to the zoo keeper, with friends describing her as a "shining light".
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At no point did the tiger escape from enclosure. The force said the animal was unharmed, adding: "The zoo will make a decision about the future of the tiger".
Garry Chisholm, 59, a wildlife photographer in his spare time who knew King through visiting the attraction in Huntingdon, Cambridgeshire, said the zoo revolved around the keeper.
The district council, which is responsible for issuing the zoo's licence, said: 'Both the police and the council are working together within routine protocols to progress investigations into the incident as efficiently and effectively as possible'.
"All our thoughts and sympathies are with our colleagues, friends and families at this awful time".
"The zoo will remain closed for the time being".
"At no point during the incident did any animals escape their enclosures and at no point was public safety affected in any way, " the zoo said in a statement. "It sounds like a tiger turned on her", Davis said.
"Rosa loved and respected those animals to the point where each and every one was like a child to her".