Police investigating the fatal shooting of two Work and Income staff in Ashburton one week ago have found the bike thought to belong to the man charged over the incident.
Russell John Tully, 48, has been charged with murdering Peggy Noble and Leigh Cleveland and with the attempted murder of Lindy Curtis, who remains in Christchurch Hospital.
The women were shot at their work place last Monday morning.
Police have spent the weekend searching a 13 kilometre stretch of the Ashburton river near the farm where Russell John Tully was arrested.
They found a black mountain bike and a number of personal items.
They will continue to look for any other items which could include an additional firearm and ammunition.
Police are also still seeking information about a coloured bike that was found last week. They want anyone who knows who it belongs to to come forward.