Several people who attended the vigils tweeted about the experience.
@Leib13: (Belfast) Was glad to be at the peace vigil outside City Hall in Belfast today. Good to see so many people wanting an end to this insanity.
@sharp_words: (Northern Ireland) Just back in office after attending peace vigil in Belfast, 1000s there, good show of solidarity.
@mandyjcollie: (Portadown, Northern Ireland) Just come back after attending the silent vigil at Belfast City Hall for the 3 men shot this week - heartbreaking
@TONUSPEREGRINUS (Belfast): Just been to pretty amazing vigil. Thousands of ppl standing for 5min in silence very moving.
@florabell (Belfast): very proud to stand beside all sectors of the community at the protest. very sad when a lone piper played 'abide with me'
Some users posted TwitPics from the scene.
@GiantBushman: Some of the crowds at the peace rally. http://twitpic.com/20h2p
@peterkerr: #silentprotest #belfast http://twitpic.com/200b8