The group are among the 100 civets that were handed over to the park from Bac Giang forest rangers and police in April. The animals were exhibits of an illegal wildlife trafficking case.
Now 70 of them meet conditions to return to nature.
This time saw the largest number of animals being released, the park said, adding that the remainders will continue to be cared for and released in the future.
The activity to return animals into the wild has been integrated into a travel tour at Cuc Phuong National Park launched this March, which promotes forest protection and management, together with education on nature conservation via ecotourism, especially in wildlife rescue and conservation./.