Dozens of Colombo residents and visitors observed a moment of silence on Tuesday morning to honour the victims of the Easter Sunday attacks in Sri Lanka. Meanwhile, families of the victims killed in a church blast in the Sri Lankan city of Negombo have held a memorial service and funerals. President Maithripala Sirisena declared a national day of mourning, a day after officials disclosed that warnings had been received weeks ago of the possibility of an attack by the radical Muslim group blamed for the bloodshed. The death toll from Sunday's bombings climbed to 321 Subscribe to Guardian News on YouTube ► http://bit.ly/guardianwiressub Sri Lanka bombings: latest updates ► https://www.theguardian.com/world/live/2019/apr/23/sri-lanka-bombings-attacks-live-news Support the Guardian ► https://support.theguardian.com/contribute Today in Focus podcast ► https://www.theguardian.com/news/series/todayinfocus The Guardian YouTube network: The Guardian ► http://www.youtube.com/theguardian Owen Jones talks ► http://bit.ly/subsowenjones Guardian Football ► http://is.gd/guardianfootball Guardian Sport ► http://bit.ly/GDNsport Guardian Culture ► http://is.gd/guardianculture