Marlborough Police are appealing to the public for information that may assist the investigation into two fires in the area over the weekend in the Wither Hills area.
The first fire broke out about 1.30pm on Saturday near Forest Park Drive and the second fire broke out about 7pm on Sunday near Taylor Pass Road.
Marlborough Police Area Commander Inspector Simon Feltham said it would be very concerning if it was established that the fires had been deliberately lit and he urged anyone with information about suspicious activity in the area to come forward.
Police are liaising with the Rural Fire Authority to investigate the fires.
Anyone with information should call Blenheim Police Ph 5785279 or Crimestoppers Ph 0800 555 111.
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