Members of the evangelical Christian group, Jesus Army, have been arrested by police investigating historic sexual and physical abuse.
The group, also known as Jesus Fellowship, is based in a former cinema in Northampton and works with homeless and vulnerable people.
The arrests followed referrals from the church itself and centre on incidents alleged to have happened between the late 1970s and late 1990s.
The Church has other centres in Coventry, London and Sheffield and plans to open one in Birmingham later this year.
Northamptonshire Police confirmed the investigation is underway into people who were members of Jesus Fellowship and others who, "frequented their premises on an ad-hoc basis".