Police believe arson attacks in the Ortons which destroyed a number of cars and a signal box could be linked.
A couple of hours earlier, at about 10.30pm, two vehicles were set alight – one in Saltmarsh and another in The Village, Orton Longueville.
A signal box for the Nene Valley Railway, at Orton Mere, was also set on fire during the early hours of today (March 13).
Detective Inspector James Sheffield said: “We are treating these fires as arson and they could be linked. We are working hard with partner agencies to trace those responsible. I would urge anyone with information, no matter how insignificant it may seem, to come forward.”
Anyone with information is asked to call 101 and quote Operation Onward.