Meir Dagan, former director of Israeli foreign intelligence agency Mossad, remains in stable condition three weeks after undergoing a liver transplant in Minsk, Belarus, local media reported Sunday.

Meir Dagan returned to Israel Saturday and was transferred to an unnamed hospital for further supervision.

Dagan, 67, was forced to undergo the surgery abroad after failing to meet Israeli and American medical criteria, which restrict liver transplants to the age of under 65 due to severe shortage of organ donations and the low chances of recovery.

Both Mossad and Israeli Foreign Ministry launched intensive efforts to assist Dagan after an acute liver cancer threatened his life, exploiting connections worldwide to find an institution that would agree to operate on an emergency basis, the Yedioth Ahronoth daily reported last week.

Belarusian President Alexander Lukashenko disclosed at a news conference two weeks ago that a senior Israeli security figure was hospitalized in his country, which is revered for performing successful liver and other complex transplants.

The country's security services placed heavy security on Dagan while he was recovering in isolation, allowing only his wife to visit him.

The former spymaster, who retired from Mossad in late 2010, reportedly spearheaded numerous covert missions aimed at sabotaging Iran's nuclear program during his eight years at the helm of the agency.