Former President Maithripala Sirisena and former Prime Minister Ranil Wickremesinghe should take the sole responsibility over the Easter Sunday attacks, a senior Military Intelligence officer attached to the Directorate of Military Intelligence (DMI) informed the Presidential Commission of Inquiry (PCoI) probing Easter Sunday attacks on July 9, reports Daily Mirror. "After the formation of the 52-day Government, the clash between the former President and former Prime Minister intensified and this had a direct impact on the country's national security," the witness said.