Nelson Mandela's health improved overnight and although his condition remains critical it is now stable, the South African government said Thursday. One of the former president's daughters said he is still opening his eyes and reacting to the touch of his family even though his situation is precarious.

The report that the health of the 94-year-old anti-apartheid leader had taken a turn for the better came amid a growing sense in South Africa that Mandela was approaching the end of his life. Well-wishers have delivered flowers and messages of support to the Pretoria hospital where he is being treated, and prayer sessions were held around the country on Thursday.

President Jacob Zuma's office said in a statement that he received the encouraging update from the medical team that is treating Mandela. Zuma had canceled an international trip on Thursday, instead visiting Mandela for the second time in two days.

"I canceled my visit to Mozambique today so that I can see him and confer with the doctors," Zuma said in the statement. "He is much better today than he was when I saw him last night."

In April, Zuma gave an overly upbeat assessment about Mandela's condition. At that time, state television broadcast footage of a visit by Zuma and other political leaders to Mandela's home. Zuma said at the time that Mandela was in good shape, but the footage showed him silent and unresponsive, even when Zuma tried to hold his hand.