Police investigating the bomb attack on Strand Road police station in Londonderry have recovered guns and ammunition.
They said they had recovered more than 100 rounds of ammunition, a rifle, a replica rifle, mobile phones and balaclavas, in recent days.
The items were uncovered at various locations in the city.
The bomb, which was blamed on dissident republicans, exploded on 3 August.
A 42-year-old man appeared at court on Friday to face a number of charges in connection with the bomb.
A 54-year-old man is still being questioned about the attack.
He was arrested on Monday and police were given permission to detain him for four days. On Thursday, they were given permission to hold him for four more.
No-one was hurt in the attack which involved a taxi being hijacked and packed with 200lbs of homemade explosives.
The driver was ordered at gunpoint to leave the car at Strand Road police station.
An organisation calling itself Oglaigh na hEireann claimed it was behind the attack, which badly damaged a number of businesses at about 0320 BST.