Police have seized two firearms during searches at the City Cemetery in Londonderry on Wednesday night.
The semi-automatic handguns were intended to kill or cause serious injury to police and members of the local community, PSNI superintendent Mark McEwan said.
A military grade assault rifle was discovered in Strabane last week.
Supt McEwan said: "While the removal of these weapons is a success it is very worrying to think that, within the district, this is now three firearms we have taken out of circulation this week.
"I cannot say if these are linked but violent dissident republican activity is the main focus of our investigations into both seizures."
The search of the cemetery grounds was part of a police investigation into violent dissident republican activity.
Supt McEwan added: "These are weapons that are made and possessed with one purpose in mind and that is to kill or cause serious injury to people.
"Those involved are intent on carrying out attacks on police officers and the local community.
"I am thankful this morning to be able to confirm we have taken these weapons out of circulation."
Anyone with information has been asked to contact police.