(CNN) Suspected suicide bombers struck three different churches in Indonesia on Sunday morning, killing at least seven people and injuring scores more, police say.

Forty-one people -- including two police officers -- are in the hospital being treated for injuries following suspected terrorist attacks in Surabaya, a port city on the east coast of Java Island, East Java Police spokesman Frans Barung Mangera said.

Police officers near the scene of hte blast at Santa Maria church in Surabaya, East Java, Indonesia.

Earlier reports indicated at least 10 people died, but Head Gen. Tito Karnavian, Indonesia's highest-ranking police official, told reporters seven victims were killed.

The explosions targeted the Santa Maria Catholic Church, the Indonesian Christian Church and the Pentecost Central Church.

St. Maria was the site of the first blast, which occurred at 7.30 a.m. local time Sunday (8.30 p.m. Saturday ET), before blasts at 7.35 a.m. and 8 a.m., state-run news agency Antara quoted him as saying.