Part of a Derby primary school has been closed after thieves stripped lead from its roof twice in a week.
The theft caused thousands of pounds of damage to Bishop Lonsdale Primary School and left water leaking into classrooms.
Some pupils are taking lessons in the school's library after the lead was stolen.
Derbyshire Police are asking anyone with information, including local scrap dealers, to contact them.
Thieves targeted the school in the early hours of 25 October and again three days later.
Computers in the school were damaged by rain after the theft.
A section of lead was left rolled up at the side of the building after the first theft, but police removed it before the thieves could return.
They climbed on to the roof again and stripped off the rest of the lead.