COLUMBIA, SC — More than half of the monkeys bred for medical research who escaped from a South Carolina compound last week have now been recovered unharmed, officials said Sunday.

Twenty-four monkeys were captured on Sunday, a day after another of the 43 escaped monkeys was recovered.

A “sizable group” remains active along the compound’s fence line and roosted in trees for the night, police in Yemassee, about 50 miles (80 kilometers) northeast of Savannah, Georgia, said in a communicated. Vets have examined the animals and initial reports indicate they are all in good health, police said.

Rhesus macaques made a break for it Wednesday after an employee at the Alpha Genesis facility in Yemassee did not fully lock a door while feeding and checking on them, officials said.

Since their escape, the apes have been exploring the outer fence of the Alpha Genesis compound, barking at the apes inside. The primates continued to interact with their companions inside the facility on Saturday, which police said was a positive sign.

Alpha Genesis CEO Greg Westergaard said efforts to recover all the monkeys will continue for as long as necessary.

Monkeys are about the size of a cat. They are all females weighing about 3 kilograms.

Alpha Genesis, federal health officials and police said the monkeys pose no risk to public health. The facility breeds monkeys to sell to medical and other researchers.

Alpha Genesis provides primates for research worldwide at its Yemassee complex, according to its website.