Nine people died and another 40 were taken to nearby hospitals, while 30 other worshippers remained unaccounted for, Jorge Cuellar, spokesperson for the Security Ministry of Tamaulipas state, which borders Texas.
Speaking on Foro TV news channel, Cuéllar thanked local businessmen for bringing equipment to help remove rubble and aid rescue efforts.
Bishop Jose Armando Alvarez from the Roman Catholic Diocese of Tampico said the church roof crumbled as worshippers were receiving communion and asked others to pray for the survivors.
“In this moment the necessary work is being carried out to pull out the people who are still under the rumble,” Bishop Armando said in a recorded message shared on social media.