Were LTTE leaders killed as they sought to surrender?

A Sunday Times report has claimed that two senior leaders of the rebel Liberation Tigers of Tamil Ealam had begged their correspondent to initiate moves for their surrender to the authorities, but were killed as they were waving white flags of truce.
According to the paper, both Balasingham Nadesan, the political leader of the Tamil Tigers, and Seevaratnam Puleedevan, the head of the Tigers' peace secretariat, made desperate telephone calls to The Times correspondent, saying that they had nowhere to turn, and would be killed in a matter of hours. We are putting down our arms," Nadesan is said to have told The Times correspondent late last Sunday night by satellite phone from the tiny slip of jungle and beach on the northeast coast of Sri Lanka where the Tigers had been making their last stand.
"I could hear machinegun fire in the background as he continued coolly: "We are looking for a guarantee of security from the Obama administration and the British government. Is there a guarantee of security?"
He was well aware that surrendering to the victorious Sri Lankan army would be the most dangerous moment in the 26-year civil war between the Tigers and Sri Lanka's Sinhalese majority.
The correspondent said that he had known both Nadesan and Puleedevan since being smuggled into rebel territory eight years ago.
At that time the Tigers controlled a third of the island; now these two men were trying to save the lives of the remaining 300 fighters and their families, many of them injured. Tens of thousands of Tamil civilians were trapped with them, hiding in hand-dug trenches, enduring near constant bombardment.
"For several days I had been the intermediary between the Tiger leadership and the United Nations as the army pressed in on the last enclave at the end of a successful military campaign to defeat the rebellion. Nadesan had asked me to relay three points to the UN: they would lay down their arms, they wanted a guarantee of safety from the Americans or British, and they wanted an assurance that the Sri Lankan government would agree to a political process that would guarantee the rights of the Tamil minority," said the correspondent.
"Through highly placed British and American officials I had established contact with the UN special envoy in Colombo, Vijay Nambiar, chief of staff to Ban Ki-moon, the secretary-general. I had passed on the Tigers' conditions for surrender, which he had said he would relay to the Sri Lankan government. The conflict seemed set for a peaceful outcome. Puleedevan, a jolly, bespectacled figure, found time to text me a smiling photo of himself in a bunker. Last Sunday night, however, as the army pressed in, there were no more political demands from the Tigers and no more photos. Nadesan refused to use the word "surrender" when he called me, but that is what he intended to do. He wanted Nambiar to be present to guarantee the Tigers' safety," he added.
"Once more, the UN 24-hour control centre in New York patched me through to Nambiar in Colombo, where it was 5.30am on Monday. I woke him up. I told him the Tigers had laid down their arms. He said he had been assured by Mahinda Rajapaksa, the Sri Lankan president, that Nadesan and Puleedevan would be safe in surrendering. All they had to do was "hoist a white flag high", he said.
"I asked Nambiar if he should not go north to witness the surrender. He said no, that would not be necessary: the president's assurances were enough. It was still late Sunday night in London. I tried to get through to Nadesan's satellite phone but failed, so I called a Tigers contact in South Africa to relay Nambiar's message: Wave a white flag high. I was woken at 5am by a phone call from another Tigers contact in southeast Asia. He had been unable to get through to Nadesan. "I think it's all over," he said. "I think they're all dead." That evening, the Sri Lankan army displayed their bodies.