diff --git a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/UserAccountDataSyncHandler.kt b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/UserAccountDataSyncHandler.kt
index 7f80486c70..c7d7dce17a 100644
--- a/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/UserAccountDataSyncHandler.kt
+++ b/matrix-sdk-android/src/main/java/org/matrix/android/sdk/internal/session/sync/handler/UserAccountDataSyncHandler.kt
@@ -39,6 +39,8 @@ import org.matrix.android.sdk.internal.database.model.IgnoredUserEntity
 import org.matrix.android.sdk.internal.database.model.PushRulesEntity
 import org.matrix.android.sdk.internal.database.model.RoomSummaryEntity
 import org.matrix.android.sdk.internal.database.model.RoomSummaryEntityFields
+import org.matrix.android.sdk.internal.database.model.TimelineEventEntity
+import org.matrix.android.sdk.internal.database.model.TimelineEventEntityFields
 import org.matrix.android.sdk.internal.database.model.UserAccountDataEntity
 import org.matrix.android.sdk.internal.database.model.UserAccountDataEntityFields
 import org.matrix.android.sdk.internal.database.model.deleteOnCascade
@@ -189,7 +191,19 @@ internal class UserAccountDataSyncHandler @Inject constructor(
                 .deleteAllFromRealm()
         // And save the new received list
         userIds.forEach { realm.createObject(IgnoredUserEntity::class.java).apply { userId = it } }
-        // TODO If not initial sync, we should execute a init sync
+
+        // Delete all the TimelineEvents for all the ignored users
+        // See https://spec.matrix.org/latest/client-server-api/#client-behaviour-22 :
+        // "Once ignored, the client will no longer receive events sent by that user, with the exception of state events"
+        // So just delete all non-state events from our local storage.
+        realm.where(TimelineEventEntity::class.java)
+                .`in`(TimelineEventEntityFields.ROOT.SENDER, userIds.toTypedArray())
+                .isNull(TimelineEventEntityFields.ROOT.STATE_KEY)
+                .findAll()
+                .also { Timber.d("Deleting ${it.size} TimelineEventEntity from ignored users") }
+                .forEach {
+                    it.deleteOnCascade(true)
+                }
     }
 
     private fun handleBreadcrumbs(realm: Realm, event: UserAccountDataEvent) {