Aid group suspends Lanka mission

"These humanitarian workers were clearly identified by their T-shirts as members of a non-governmental organisation," said the group's director Benoit Miribel. "Their deaths are unacceptable, and show that barbarity is winning the battle against solidarity."

"As far as I know this is the biggest single death toll inflicted on an NGO. I have never seen anything like this," Miribel said, calling for an independent investigation to find those responsible.