22 April 2013
Last updated at 17:36 ET
Massachusetts Governor Deval Patrick called on Bostonians to observe a moment of silence for the victims of the Boston Marathon bombing exactly a week after the attack, at 14:50 local time (18:50 GMT). These people gathered on Boylston Street, close to where the two bombs exploded.
The explosions near the race finish line killed three people and injured more than 200. People could be seen bowing their heads and weeping at the scene this Monday.
Traders at the New York Stock Exchange also paused for the silence.
A walk in memory of the Boston victims was held in the Canadian capital, Ottawa. Pairs of sports shoes were tied to the gates of the US embassy symbolically.
In Paris, runners stood for a moment of silence to show support for Boston, after a special three-mile run through the streets of the French capital.
A funeral service for one of the victims, Krystle Campbell, was held at St Joseph's Catholic church in Medford, Massachusetts.
Friends, family and members of the public gathered outside the church.
Krystle's mother Patty, pictured, described her daughter as a wonderful person with a heart of gold.
Mourners wept as they left the church.
Medford Fire Department Captain Tom Brennan was among the mourners at the funeral.
Apart from Ms Campbell, eight-year-old Martin Richard and Lu Lingzi, a female postgraduate student from China, were killed.