Three blasts at a Christian convention in Kerala's Kalamassery killed three and injured 52.
Preliminary findings attribute the explosion to an improvised explosive device.
Dominic Martin claimed responsibility, surrendering to police.
Kerala Chief Minister announced a 20-member probe team.
#KeralaBlasts #ChristianConventionTragedy #InvestigationInProgress #SafetyFirst #KalamasseryExplosion ~ED.102~GR.122~HT.98~
