Flames were seen coming out of both sides of St Mary's Church
A third boy has been arrested in connection with an arson attack at a 19th Century church in Cambridgeshire.
The boy, a 13-year-old from March, was arrested on Friday evening on suspicion of arson after a fire that destroyed St Mary's at Westry.
He has been bailed to return to the police station in March on 20 April.
Two other boys, aged 14 and 16, were arrested on Thursday on suspicion of arson and have also been bailed until 20 April.
The fire broke out last Monday at the church on the outskirts of March and flames were seen coming out of both sides of the building.
Only the external brickwork remains and the church has been assessed as unsound.