diff --git a/app/api/v2/handlers/fact_source_api.py b/app/api/v2/handlers/fact_source_api.py
index 4ff87e791..1112587e5 100644
--- a/app/api/v2/handlers/fact_source_api.py
+++ b/app/api/v2/handlers/fact_source_api.py
@@ -2,7 +2,7 @@
 from aiohttp import web
 
 from app.api.v2.handlers.base_object_api import BaseObjectApi
-from app.api.v2.managers.base_api_manager import BaseApiManager
+from app.api.v2.managers.fact_source_manager import FactSourceApiManager
 from app.api.v2.schemas.base_schemas import BaseGetAllQuerySchema, BaseGetOneQuerySchema
 from app.objects.c_source import Source, SourceSchema
 
@@ -11,7 +11,7 @@ class FactSourceApi(BaseObjectApi):
     def __init__(self, services):
         super().__init__(description='Fact Source', obj_class=Source, schema=SourceSchema, ram_key='sources',
                          id_property='id', auth_svc=services['auth_svc'])
-        self._api_manager = BaseApiManager(data_svc=services['data_svc'], file_svc=services['file_svc'])
+        self._api_manager = FactSourceApiManager(data_svc=services['data_svc'], file_svc=services['file_svc'], knowledge_svc=services['knowledge_svc'])
 
     def add_routes(self, app: web.Application):
         router = app.router
@@ -102,4 +102,7 @@ async def create_or_update_source(self, request: web.Request):
     @aiohttp_apispec.response_schema(SourceSchema, description='Returns DELETE status.')
     async def delete_source(self, request: web.Request):
         await self.delete_on_disk_object(request)
+        knowledge_svc_handle = self._api_manager.knowledge_svc
+        await knowledge_svc_handle.delete_fact(criteria=dict(source=request.match_info.get('id')))
+        await knowledge_svc_handle.delete_relationship(criteria=dict(origin=request.match_info.get('id')))
         return web.HTTPNoContent()
diff --git a/app/api/v2/handlers/operation_api.py b/app/api/v2/handlers/operation_api.py
index e8881d0f8..17bf13645 100644
--- a/app/api/v2/handlers/operation_api.py
+++ b/app/api/v2/handlers/operation_api.py
@@ -132,6 +132,9 @@ async def update_operation(self, request: web.Request):
                                      description='There is an empty response from a successful delete request.')
     async def delete_operation(self, request: web.Request):
         await self.delete_object(request)
+        knowledge_svc_handle = self._api_manager.knowledge_svc
+        await knowledge_svc_handle.delete_fact(criteria=dict(source=request.match_info.get('id')))
+        await knowledge_svc_handle.delete_relationship(criteria=dict(origin=request.match_info.get('id')))
         return web.HTTPNoContent()
 
     @aiohttp_apispec.docs(tags=['operations'],
diff --git a/app/api/v2/managers/fact_source_manager.py b/app/api/v2/managers/fact_source_manager.py
new file mode 100644
index 000000000..2a0afbb97
--- /dev/null
+++ b/app/api/v2/managers/fact_source_manager.py
@@ -0,0 +1,6 @@
+from app.api.v2.managers.base_api_manager import BaseApiManager
+
+class FactSourceApiManager(BaseApiManager):
+    def __init__(self, data_svc, file_svc, knowledge_svc):
+        super().__init__(data_svc=data_svc, file_svc=file_svc)
+        self.knowledge_svc = knowledge_svc
diff --git a/app/api/v2/managers/operation_api_manager.py b/app/api/v2/managers/operation_api_manager.py
index ada8be28f..e7409a62f 100644
--- a/app/api/v2/managers/operation_api_manager.py
+++ b/app/api/v2/managers/operation_api_manager.py
@@ -21,6 +21,7 @@ class OperationApiManager(BaseApiManager):
     def __init__(self, services):
         super().__init__(data_svc=services['data_svc'], file_svc=services['file_svc'])
         self.services = services
+        self.knowledge_svc = services['knowledge_svc']
 
     async def get_operation_report(self, operation_id: str, access: dict, output: bool):
         operation = await self.get_operation_object(operation_id, access)
diff --git a/app/objects/c_operation.py b/app/objects/c_operation.py
index d7b553773..7f961d8f1 100644
--- a/app/objects/c_operation.py
+++ b/app/objects/c_operation.py
@@ -187,9 +187,10 @@ def update_untrusted_agents(self, agent):
 
     async def all_facts(self):
         knowledge_svc_handle = BaseService.get_service('knowledge_svc')
+        data_svc_handle = BaseService.get_service('data_svc')
         seeded_facts = []
         if self.source:
-            seeded_facts = await knowledge_svc_handle.get_facts(criteria=dict(source=self.source.id))
+            seeded_facts = await data_svc_handle.get_facts_from_source(self.source.id)
         learned_facts = await knowledge_svc_handle.get_facts(criteria=dict(source=self.id))
         learned_facts = [f for f in learned_facts if f.score > 0]
         return seeded_facts + learned_facts
diff --git a/app/service/data_svc.py b/app/service/data_svc.py
index 5f23a0d58..f768823bd 100644
--- a/app/service/data_svc.py
+++ b/app/service/data_svc.py
@@ -481,3 +481,12 @@ async def _verify_adversary_profiles(self):
     def _get_plugin_name(self, filename):
         plugin_path = pathlib.PurePath(filename).parts
         return plugin_path[1] if 'plugins' in plugin_path else ''
+    
+    async def get_facts_from_source(self, fact_source_id):
+        fact_sources = await self.locate('sources', match=dict(id=fact_source_id))
+        if len(fact_sources) == 0:
+            return []
+        elif len(fact_sources) > 1:
+            self.log.error('Found multiple fact sources with the same id', fact_source_id)
+            return []
+        return fact_sources[0].facts