The Sri Lankan military on Monday dismissed as "concocted" a report claiming that LTTE Supremo Velupillai Prabhakaran was tortured before he was executed after he "surrendered" to the army.

The Sri Lanka Guardian, a US-based website, had reported last week that "the LTTE leader Velupillai Prabhakaran had surrendered to the army in the final stage of the war without swallowing the cyanide capsule tied to his neck".

The report, quoting a "senior Defence Ministry source in Colombo", claimed that the "credible" evidence obtained from the source "reveal that the Tiger chief was barbarically slaughtered by a senior Sri Lankan army officer".

The Lankan military described the report as "concocted stories, replete with hypotheses and utterly false fabricated stories."

"The latest were a series of purposely planted such stories and e-mails being published in a website called "Sri Lanka Guardian" in which a new version to the consequences that led to Prabhakaran's death has been concocted.

"Defence authorities flatly reject contents of these fabricated stories and are planning prosecution against those publishers in accordance with legal provisions that have already been published," the Media Centre for National Security said in a statement.