Three vehicle fires are being treated as arson.
A Vauxhall Corsa was set alight on Lowther Road, Lancaster, around 10pm on Saturday. The car had been broken into and the front passenger seat torched.
In Astley Village, near Chorley, a motorbike, believed to have been stolen, was set alight at 2am on Sunday.
And firecrews in Preston were called to Franklands Drive in Ribbleton at 5.15am on Sunday, after an off-road buggy was set on fire in a garden.
The incidents are not being linked.