BOSTON — People are lining up hours ahead of time to get into Boston’s Roman Catholic cathedral for an interfaith service to remember the victims of the Boston Marathon bombings.

President Barack Obama and first lady Michelle Obama are scheduled to attend the service at the Cathedral of the Holy Cross that starts at 11 a.m. Thursday.

The event is open to the public on a first-come, first-seated basis. Doors open at 8 a.m. and people were lined up to get in at 5 a.m.

Three people were killed and more than 170 injured when two bombs went off at the marathon’s finish line Monday.

The service includes reflections by representatives of Protestant, Jewish, Muslim, and Greek Orthodox faiths and Boston’s Roman Catholic cardinal.

The president is expected to speak. Cellist Yo-Yo Ma is scheduled to perform.

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