A police van responding to an emergency call was involved in a crash outside the Castle Gardens pub in Poulton.
Buses are being diverted following road closures after a vehicle crashed into the side of the van on Poulton Road, close to the pub, at 2.50pm.
A police spokesman said: “The police van was responding to a call – it would have had its blues and twos on – and a vehicle has gone into the side of it.
“There were no injuries but people were shocked and a bit upset.”
An ambulance was called to the scene.
Blackpool Transport is diverting its number 14 and 16 buses.
Service 14 will go via Arundel Drive, Tithebarn Street and Poulton centre to Blackpool Road North. Service 16 will go via Arundel Drive and Tithebarn Street to Poulton Centre.