While testifying before the Parliament Select Committee (PSC) last week, Mendis had claimed that President Maithripala Sirisena failed to hold regular security review meetings, Colombo Gazette reported.
On Friday, Sirisena had called an emergency cabinet meeting and said that police, military, intelligence officials and ministers will not testify before the PSC.
Multiple blasts ripped through Sri Lanka on April 21, when the Christian community was celebrating Easter Sunday. The explosions rattled churches and high-end hotels across the country, killing 258 people and injuring over 500.
A local Jihadi group and ISIS affiliate, National Thowheeth Jama'ath, claimed responsibility for the devastating attacks which have been widely condemned.
Indian intelligence agencies had sent several warnings to their Sri Lankan counterparts warning of a possible terror attack. However, Sirisena and Prime Minister Ranil Wickremesinghe have both said that they were not informed about it before the April 21 attacks.
The Sri Lankan government said that people connected to the attacks have been apprehended.
(This story has not been edited by Business Standard staff and is auto-generated from a syndicated feed.)