Police in Derry have found six explosive devices and a machine pistol after further searches in the city.
The items were uncovered during a search of a house at Stewart's Terrace in the Rosemount area last night.
A quantity of ammunition was also found.
Officers were attacked as they withdrew from the area by a crowd of youths throwing masonry and petrol bombs.
The latest find comes after police discovered plastic explosive and military grade hand grenades along with two handguns in the city on Thursday night.
That search operation was also met with violence by gangs of youths and 16 officers were injured.
The PSNI said more than a kilogram of plastic explosive and two grenades were found.
They believe the weapons belong to the New IRA.
Two men and woman arrested after Thursday’s searches remain in custody.
