1.   On one occasion excreta was placed in the fridge and there was an unexplained minor fire.

2.   There had been three unexplained fires at the school in the previous six months.

3.   The computer was damaged twice by unexplained fires in his office, before the comptroller impounded it so damaged files could be reconstructed.

4.   But Mafia car bombs and unexplained fires have done the most spectacular damage.

5.   Hundreds of police and firemen puzzled on Monday over unexplained fires which have broken out in this eastern French town for no apparent reason.