Police are investigating after graffiti was painted on to the wall of a Muslim prayer hall at a cemetery in Lancashire.
The writing was discovered in the Pleasington cemetery on Tower Road, Blackburn earlier.
Ch Supt Bob Eastwood said the graffiti, which appeared overnight, was "unacceptable".
Blackburn Council has painted over the writing and will not comment on the nature of the graffiti.
Ch Supt Bob Eastwood said: "It is unacceptable for anyone to commit crimes like this, especially at places of worship."
He appealed for anyone with information to contact Lancashire Police.