The leaders of Britain and Ireland joined hundreds of mourners Wednesday at the funeral of Lyra McKee, the young journalist shot dead during rioting in Northern Ireland last week.

Prime Minister Theresa May will skip her weekly House of Commons question-and-answer session to attend the service at Belfast's St. Anne's Cathedral, her Downing Street office said.

U.K. Labour Party leader Jeremy Corbyn is also expected at the funeral, along with Irish Prime Minister Leo Varadkar and Ireland's President, Michael D. Higgins.

McKee, 29, was killed Thursday as she reported on rioting in the city of Londonderry, also known as Derry.

She was the first journalist killed on the job in the U.K. for almost 20 years, and her death caused wide shock in Northern Ireland still shaken by tremors from decades of violence known as the "Troubles."

A small Irish nationalist militant group, the New IRA, said it was responsible. The group apologized, saying McKee was shot "while standing beside enemy forces" - a reference to the police.

Police arrested two teenagers and a 57-year-old woman but released all three without charge.

The IRA and most other paramilitary groups have disarmed since Northern Ireland's 1998 peace accord.

The New IRA has been formed from splinter groups opposed to the peace process. It has claimed responsibility for a series of letter bombs sent to transit hubs in Britain last month. No one was injured.

McKee had written about the struggles of the "cease-fire babies," the generation raised after the 1998 Good Friday accord in a Northern Ireland that was supposed to be moving beyond sectarian conflict.

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