ROUGH CUT (NO REPORTER NARRATION) Sri Lankan local broadcasters showed surveillance footage of the suspected bomber carrying a heavy backpack and walking on the street before heading into St.
Sebastian Church on Easter Sunday before the attack.
Dozens were killed there.
Islamic State claimed responsibility on Tuesday for the bomb attacks in Sri Lanka that killed 321 people in what officials believe was retaliation for assaults on mosques in New Zealand.
The claim, issued through the group's AMAQ news agency, was made after Sri Lanka said two domestic Islamist groups with suspected links to foreign militants were suspected to have been behind the attacks at three churches and four hotels.
The toll rose to 321 dead with about 500 people wounded.