Two people were arrested as they were stealing a railway cart in the early hours of this morning.
They had plyboard and pallets, which had been stolen from the surrounding area, with them.
They were found near Rencell Hill in Laxey.
Police are appealing to anyone who saw anything suspicious in the area, in particular on the Manx Electric Railway tracks, to get in touch.
Police said they wanted to highlight the danger to life posed by trespassing on MER property and interfering with MER rolling stock.
Anyone with information should contact Ramsey police station 812243 or 631212.