Israeli Prime Minister Ariel Sharon remains in a critical but stable condition following emergency surgery on Saturday, doctors say.
Doctors' chief concern is Sharon's failure to wake from a coma
Mr Sharon is back in intensive care after doctors removed one third of his large intestine after a scan revealed it was damaged and infected.
Mr Sharon, 77, has been in a coma since 4 January, when he suffered a severe stroke and underwent brain surgery.
Interim Prime Minister Ehud Olmert assumed his powers in January.
ARIEL SHARON'S HEALTH
18 Dec 2005: Sharon suffers minor stroke
4 Jan 2006: Sharon rushed to hospital one day before scheduled heart surgery with major stroke
4/5 Jan: Undergoes two operations overnight
6 Jan: Third round of surgery
9 Jan: Doctors start to try to rouse him from medically induced coma
15 Jan: Has tracheotomy to help to wean him off respirator
25 Jan: Medical team hold talks with long-term care specialists
1 Feb: Doctors insert feeding tube into stomach
10 Feb: Brain scan shows no change in condition
11 Feb: Has infected area of colon removed after condition worsens
Mr Sharon had nearly four hours of surgery after a deterioration in his health on Saturday morning.
Surgeons at the Jerusalem hospital removed about 50 cm (20 inches) of the large intestine, after a scan revealed that it was damaged, inflamed and infected.
Shortly after the operation, Hadassah hospital spokesman Ron Krumer declared the operation to be "a success".
Hospital director Shlomo Mor-Yosef said Mr Sharon was out of immediate danger, but the most serious concern was his coma, not his abdominal complications.
Mr Sharon's failure to wake up after being taken off sedatives last month has led to speculation that he has suffered severe brain damage.
His deputy Ehud Olmert will lead the newly formed centrist Kadima party in the general election on 28 March.