Thousands of people gathered in England on Tuesday  to mark the one-year anniversary  of the 2017 Manchester Arena bombing.

U.K.

Prime Minister Theresa May and Prince William joined hundreds of people at Manchester Cathedral to honor victims of the attack at a memorial service.

There was also a  national moment of silence  at 2:30 p.m. local time.  On May 22, 2017, 22 people, including children, died after a  bomb exploded  at the end of an Ariana Grande concert inside Manchester Arena.

Two weeks later, Grande organized a benefit concert that raised millions of dollars for those affected by the bombing.  SEE MORE: UK Government Could Ban Combustible Cladding On High-Rise Buildings On Tuesday,  Grande tweeted : "Thinking of you all today and every day.

I love you with all of me and am sending you all of the light and warmth I have to offer on this challenging day."  Bells will ring at 10:31 p.m. at the city center in Manchester — the exact time of last year's bombing.  Additional reporting from  Newsy affiliate CNN .