DILI, East Timor — East Timor’s president was in “extremely serious” but stable condition at an Australian hospital today after surgeons worked through the night to remove bullet fragments he suffered in a failed coup attempt, the hospital’s administrator said.

Dr. Len Notaros, the general manager of the Royal Darwin Hospital, told the Australian Broadcasting Corp. this morning that surgeons operated on President Ramos-Horta for three hours overnight to remove the fragments and repair his wounds.

“His condition remains extremely serious but by the same token, stable,” Dr. Notaros said. “The next few days will be the telling point.”

Mr. Ramos-Horta, who won the 1996 Nobel Peace Prize for his non-violent resistance to the decades-long Indonesian occupation, was shot in the chest and stomach by gunmen in two cars around dawn yesterday, officials said.

Rebel soldiers separately attacked Prime Minister Xanana Gusmao’s motorcade an hour later. He escaped unhurt.

The strikes against the two independence icons were a striking reminder of the bitter rivalries beneath the surface in Asia’s newest nation and could trigger more unrest and political turmoil.

The country’s top fugitive, Alfredo Reinado, and one of his men were killed in the attack on the president. One of the president’s guards also died.

South Africa’s U.N. Ambassador Dumisani Kumalo, who led a council mission to East Timor, told reporters at U.N. headquarters in New York that the president was shot as he took his regular morning walk.

“One report is that they went to the house looking for him and discovered that he was on his walk and that’s where they attacked him,” Mr. Kumalo said. “He’s a very simple man … a man of the people, and sometimes you pay a price for that.”

Mr. Ramos-Horta, 58, first underwent surgery at an Australian army hospital in East Timor before being sedated, attached to a ventilator, and airlifted to the hospital in the northern Australian city of Darwin.

Dr. Notaros said Mr. Ramos-Horta’s wounds indicated he had been shot two or three times. The most serious wound was to his the lower part of his right lung near his liver, and would likely require more surgery. There was also a risk of sepsis infection, Dr. Notaros said.

The fragments will be handed to Australia Federal Police for the investigation into the shooting, Dr. Notaros said. At least one fragment was being left in his body, and was not thought to be threatening, he said.

Mr. Gusmao called the attacks a well-planned operation intended to “paralyze the government and create instability.”

“I consider this incident a coup attempt against the state by Reinado and it failed,” Mr. Gusmao said. “This government won’t fall because of this.”

Mr. Reinado was among 600 mutinous soldiers dismissed by the government in 2006 — a move that triggered gun-battles between security forces that later spilled over into gang fighting and ethnic unrest.

At least 37 people were killed and more than 150,000 people forced from their homes in the unrest, which also led to the resignation of the country’s first post-independence prime minister.

Mr. Reinado was arrested but escaped from prison after several months.

He was charged with murder in connection with the 2006 violence, but had remained in hiding and had threatened armed insurrection against the government.