“Officers are out in the area today offering reassurance to local residents and I would like to reiterate that incidents of this nature are extremely rare, " added Det Insp Andy Howard.
"At this time we believe this to be an isolated incident.”
Anyone with information can contact Det Insp Howard on 101.
If you don't want to speak directly to the police you can contact the independent charity Crimestoppers anonymously on 0800 555 111 or online at crimestoppers-uk.org.
More top news
A man has been jailed for life for the "callous" murder of his ex-partner. Colin Dymond, who's 52, killed Sarah Pollock in her flat.
Friday afternoon's forecast for the west of the region
Friday afternoon's forecast for the east of the region