Evangelist Billy Graham is showing signs of improvement as he continues to recover from pneumonia in a North Carolina hospital, a spokeswoman for Asheville's Mission Hospital said Sunday.

The 93-year-old Graham was admitted to the hospital Wednesday in stable condition.

"Doctors are encouraged by Mr. Graham's significant clinical progress, but have not yet set a date for discharge," hospital spokeswoman Merrell Gregory said in a statement.

Gregory also reported progress in Graham's physical therapy, saying he is "walking more in the private corridor outside his room."

Graham was visited over the weekend by his family, according to Gregory. He also watched on television his pastor deliver his regular Sunday sermon, she said.

This is Graham's second bout with pneumonia this year. He was previously hospitalized for the infection in May.