Tamil Tiger leader Velupillai Prabhakaran was tortured by the Sri Lankan army, before being killed, a leading human rights body said in a report published Wednesday.
University professors for Human Rights (UTHR) high level quoted military sources as saying that Prabhakaran had been tortured in the presence of a "politician and the Government of Tamil general.
Torture, "she said, probably took place at the headquarters of Division 53 of the army, which fought against the Liberation Tigers of Tamil Eelam (LTTE) before the pack last month.
"Several military sources have said that Prabhakaran (youth) 12-year-old son Balachandran was killed after capture. Our (sources) said that he was killed in front of his father," said UTHR, which has always been critical of excesses by both the army and the LTTE.
"These sources added that this information is correct, unless the officers at the highest level are fibbing to one another.
"Our sources in addition to several others have all said that the LTTE persons remaining in the NFZ (No Fire Zone) were massacred," he added in a 48-page report, an advance copy of which was made available to IANS.
Sri Lanka has announced that May 18 Prabhakaran, founder leader of the LTTE, was killed in one in the north-eastern district of Mullaitivu, where the Tigers have massed their forces before descending.
His body was put on display, placed on a stretcher, the back of his head torn off.
Sri Lankan Minister Vinayagamurthy Muralitharan alias Karuna, a former confidant of Prabhakaran, told IANS that the LTTE leader was killed with 18 of his bodyguards.
Prabhakaran's death marked the end of the conflict by dragging the LTTE which has 90,000 people since 1983.
UTHR said: "The information is spread in the public domain in the army point of capture or surrender, but the responses are to reject the stories that rehash the public no longer credible. It is left to an impartial investigation to answer this and related issues. "
UTHR said that the government has been evasive about the fate of the wife of Prabhakaran Mathivathani.
He cites a sergeant said: "We had to look Prabhakaran's body because the world was interested in seeing it. But his wife's body is not of any importance to us."
The UTHR report said: "This is the unknown fate of hundreds of civilians and militants killed in the last days (or in the fight against)."
According to the report, among the leaders of the LTTE which went to the army included Baby Subramaniam, a member of the group since 1976 and one of the oldest associated Prabhakaran.
Others have now included in the government retains the region of the province of the former political leader Karikalan, former spokesman Yogaratnam Yogi, former head of the LTTE International Secretariat Lawrence Thilakar, political advisor V. Umar Balak, Jaffna and Trincomalee leader Ilamparithi political leader Elilan.