Premier Andreas Papandreou was steadily recovering from pneumonia Thursday, doctors said, but they would not predict when he would be released from the hospital.

The frail, 76-year-old premier was admitted to the Onassis Cardiac Surgery Center’s intensive care unit Monday after he had trouble breathing.

Hospital spokesman Grigoris Skalkeas said the premier was still on a respirator, but was being weaned from it and might be able to breathe on his own as soon as Friday.