Volunteers clean the smoke trails on the walls and the ground of the grotto beneath the Church of the Nativity, revered as the site of Jesus' birth, in the West Bank city of Bethlehem, Tuesday, May 27, 2014. A fire broke out today at Bethlehem's Church of the Nativity, causing slight damage near the place where Jesus was thought to have been born. (AP Photo)

Volunteers clean smoke damage on the entrance of the grotto beneath the Church of the Nativity, revered as the site of Jesus' birth, in the West Bank city of Bethlehem, Tuesday, May 27, 2014. A fire broke out today at Bethlehem's Church of the Nativity, causing slight damage near the place where Jesus was thought to have been born. (AP Photo)

A Christian cleric takes part in efforts to clean smoke damage at the grotto beneath the Church of the Nativity, revered as the site of Jesus' birth, in the West Bank city of Bethlehem, Tuesday, May 27, 2014. A fire broke out today at Bethlehem's Church of the Nativity, causing slight damage near the place where Jesus was thought to have been born. (AP Photo)

A volunteer puts framed pictures back in their place after cleaning smoke damage over the entrance of the grotto beneath the Church of the Nativity, revered as the site of Jesus' birth, in the West Bank city of Bethlehem? Tuesday, May 27, 2014. A fire broke out Tuesday at Bethlehem's Church of the Nativity, causing slight damage near the place where Jesus was thought to have been born. (AP Photo)

wo volunteers clean smoke damage from the walls of the grotto beneath the Church of the Nativity, revered as the site of Jesus' birth, in the West Bank city of Bethlehem, Tuesday, May 27, 2014. A fire broke out today at Bethlehem's Church of the Nativity, causing slight damage near the place where Jesus was thought to have been born. (AP Photo)

Volunteers replace items after removing smoke damage at the grotto beneath the Church of the Nativity, revered as the site of Jesus' birth, in the West Bank city of Bethlehem, Tuesday, May 27, 2014. A fire broke out today at Bethlehem's Church of the Nativity, causing slight damage near the place where Jesus was thought to have been born. (AP Photo)

Palestinian officials arrive to inspect the grotto beneath the Church of the Nativity, revered as the site of Jesus' birth, in the West Bank city of Bethlehem, Tuesday, May 27, 2014. A fire broke out today at Bethlehem's Church of the Nativity, causing slight damage near the place where Jesus was thought to have been born. (AP Photo)