RAHWAY, N.J. (AP) — Authorities say several people were injured when the roof of a northern New Jersey church collapsed during an Easter Sunday service.

Congregants were reportedly singing at the Korean Union United Methodist Church in Rahway when they heard a cracking sound from above and debris began falling down on them.

One person was seriously injured; about a dozen others had minor injuries. The injured people reportedly were members of a separate congregation that rents out space at the church. None of the injuries were considered life-threatening.

It’s not yet known what caused the collapse Sunday afternoon. Everyone was able to quickly exit the church.