Chimp attack victim's family arrives in South Africa

In this photo taken Feb. 1, 2011, chimpanzees sit in an enclosure at the Chimp Eden rehabilitation center, near Nelspruit, South Africa. A paramedic official says chimpanzees at a sanctuary for the animals in eastern South Africa bit and dragged a man at the reserve, badly injuring him. In a statement, Jeffrey Wicks of the Netcare911 medical emergency services company said the man he described as a ranger was leading a tour group at the Jane Goodall Institute Chimpanzee Eden Thursday June 28, 2012 when two chimpanzees grabbed his feet and pulled him under a fence into their enclosure. The international institute founded by primatologist Jane Goodall opened the sanctuary in 2005. It is a home to chimpanzees rescued from further north in Africa, where they are hunted for their meat of held captive as pets. (AP Photo/Erin Conway-Smith)

July 2, 2012 5:40:06 AM PDT
The parents of an American graduate student who was attacked by chimpanzees at a South African sanctuary have arrived at the Jane Goodall Institute Chimpanzee Eden, according to ABC News.

Andrew F. Oberle, 26, remains hospitalized. He was seriously injured Thursday when two chimpanzees pulled him under a fence. Oberle is a University of Texas at San Antonio anthropology graduate student.

Carl Oberle described chimps as his nephew's "passion" and says he knew each animal by its "name and face."

A conservationist who runs the sanctuary says investigators will have to wait until Oberle is well enough to provide details to try to determine what prompted the attack.

The Associated Press contributed to this report. All rights reserved.