People brought flowers to Republic square for a vigil for the victims of the Paris attacks.

People gathered outside Notre Dame Cathedral ahead of a ceremony to honor the Paris attack victims.

Aurelie Mehaute attended a rally at Boston Common in memory of Paris victims.

A man held a sign that combined the peace symol and the Eiffel Tower at Boston Common.

Anne Sandstrom of Burlington was at Boston Common.

Cyril Dayon, Loris Boichot, Erick Carpenter and son Gibson Carpenter were at Boston Common today.

Boston Police Commissioner William Evans, Mayor Martin Walsh and other officials spoke at a press conference Sunday.

Boston-area residents gathered at Boston Common today in memory of victims of the Paris attacks.

A crowd gathered at the Carillon restaurant, site of one of the attacks in Paris.

Paris residents gathered Sunday at a memorial near the Bataclan concert hall, site of one of the attacks.

A rose was placed in a bullet hole in a restaurant window the day after a series of deadly attacks in Paris. The note read: "In the name of what?"

The Eiffel Tower had its lights turned off on Saturday.

The Zakim Bridge was lit in rotating colors of the French flag.

Flowers and candles were near the Bataclan concert hall, scene of one of the attacks.

Police patroled near the Eiffel Tower the day after a series of deadly attacks in Paris.

Residents in Paris lined up to give blood after the attacks.

The French flag was at half-mast at the Elysee palace in Paris.