Police Media Spokesman SP Ruwan Gunasekera said the Police are Investigating over 1800 numbers that interacted with mobiles phones used by terrorrists who carried out the Easter Sunday explosions.
He said their mobile phone details and call records are being investigated by the Police.
The Police have recovered mobile phones used by nine suicide bombers who carried out Easter Sunday explosions.
The Media Spokesman said the Police would grill those who contacted the suicide bombers over the phone.