The Easter Sunday attacks were the work of suicide bombers, High Commissioner of Sri Lanka to the UK, Manisha Gunasekera, tells CNN.
She says seven people were arrested in connection with the attacks but could not confirm their nationalities.
“There is also information that these have been suicide bombings carried out. These are certainly acts of terror,” Gunasekera adds.
"It's been a day of great tragedy for Sri Lanka. The scale is unprecedented."
She says it’s unknown "which group or groups carried out these attacks” but “this is an attack against the whole of Sri Lanka because Sri Lanka is very multi-ethnic, multi-religious and multi-cultural country and the whole country comes together in celebration of Easter Sunday.”