Two pit bull terriers were in the custody of an animal control warden Friday after they attacked and killed a graduate student on his way to a friend's house, authorities said.

Kevin B. Cull, 25, of De Kalb, suffered severe bites on his ankles, legs, hips and arms. He was taken to Central Du Page Hospital, where he died Thursday night, said hospital spokeswoman Trish Hummell.Coroner Richard Ballinger speculated the injuries were sustained shortly before Cull was found and said an inquest was scheduled.