Four town centre pubs were damaged in just five days when rocks were thrown through their windows.
Police are investigating who has caused the damage and they believe it was all done by the same person.
The first incident was at the Rose And Crown, on St Thomas’ Road, Chorley, on November 21.
It was followed by Sir Henry Tate, on New Market Street, on November 23; the Royal Oak, on Market Street, on November 24; and Sam’s Bar, on Railway Street, on November 26.
The pubs were all targeted between midnight and 6am each time, when the pubs were closed.
Andrea Smith, manager of the Rose And Crown, said a brick was thrown at a window etched with the name of the pub.
The damage was discovered by the pub’s chef the next morning.
She said: “It’s the inconvenience as well as the cost. We are spending money on making the pub look nice and then have to board it up for three or four days until workmen can come and fix the window.
“There’s no reason for it. It’s just malicious damage.
“I don’t want this to happen again.”
PC Nic Barff-Lewis, from Chorley neighbourhood policing team, wants to hear from anyone who was in the town centre, or driving through, and saw anything suspicious.
She said: “I’m appealing for any information because I believe it’s the same person doing it.
“Rocks or stones are being used to shatter quite large windows.
“They are not trying to break in, they are just causing damage.”
Windows have been broken at other town centre businesses, including a cafe, in recent weeks, though it is not known if they are linked to the damage at the pubs.
Police are asking for anyone with information about any of the damage to call them on 101.