A health watchdog says the beavers living on an East Devon river won't harm humans.
Environmental group Friends of the Earth have put in a Freedom of Information request to Public Health England to discover the details.
Officials at DEFRA say they might be carrying a disease and need to be taken away and tested - But although the watchdog is concerned about the disease, it doesn't believe the beavers will increase the risk to humans.
Arrest made after body found in Plymouth waters
Teenager questioned on suspicion of murder
Clear-up begins after Storm Ingrid
Strong winds and rain batter Devon
Car park hike at beauty spot will impact residents
Council slammed for penalising locals
East Devon town faces yet another delay
Community hub in Cranbrook has suffered delays
Rail in North Devon needs to be “fit-for-purpose”
Urgent improvements needed
Storm Ingrid causes disruption across Devon
Yellow warning for rain until 22.00
