Police are appealing for information after a large amount of cabling was stolen from the grounds of Harrogate District Hospital.
The theft took place overnight between Monday 31st August and Tuesday 1st September.
Officers believe a vehicle at least the size of a Transit van would have been needed to remove the cabling.
Police are asking anyone who witnessed suspicious activity in the area to come forward.
They would also like to hear from anyone who may have captured relevant footage on a mobile phone, home security camera or vehicle dashcam.
Information can be emailed to mark.burrows@northyorkshire.police.uk or reported to North Yorkshire Police by calling 101.
Crimestoppers can also be contacted anonymously on 0800 555 111 or through its website.
Anyone providing information should quote reference 12260171012.

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