diff --git a/internal/rdb/inspect.go b/internal/rdb/inspect.go
index 26c34cc..5db9572 100644
--- a/internal/rdb/inspect.go
+++ b/internal/rdb/inspect.go
@@ -1447,6 +1447,50 @@ func (r *RDB) deleteAll(key, qname string) (int64, error) {
 	return n, nil
 }
 
+// deleteAllAggregatingCmd deletes all tasks from the given group.
+//
+// Input:
+// KEYS[1] -> asynq:{<qname>}:g:<gname>
+// KEYS[2] -> asynq:{<qname>}:groups
+// -------
+// ARGV[1] -> task key prefix
+// ARGV[2] -> group name
+var deleteAllAggregatingCmd = redis.NewScript(`
+local ids = redis.call("ZRANGE", KEYS[1], 0, -1)
+for _, id in ipairs(ids) do
+	redis.call("DEL", ARGV[1] .. id)
+end
+redis.call("SREM", KEYS[2], ARGV[2])
+redis.call("DEL", KEYS[1])
+return table.getn(ids)
+`)
+
+// DeleteAllAggregatingTasks deletes all aggregating tasks from the given group
+// and returns the number of tasks deleted.
+func (r *RDB) DeleteAllAggregatingTasks(qname, gname string) (int64, error) {
+	var op errors.Op = "rdb.DeleteAllAggregatingTasks"
+	if err := r.checkQueueExists(qname); err != nil {
+		return 0, errors.E(op, errors.CanonicalCode(err), err)
+	}
+	keys := []string{
+		base.GroupKey(qname, gname),
+		base.AllGroups(qname),
+	}
+	argv := []interface{}{
+		base.TaskKeyPrefix(qname),
+		gname,
+	}
+	res, err := deleteAllAggregatingCmd.Run(context.Background(), r.client, keys, argv...).Result()
+	if err != nil {
+		return 0, errors.E(op, errors.Unknown, err)
+	}
+	n, ok := res.(int64)
+	if !ok {
+		return 0, errors.E(op, errors.Internal, "command error: unexpected return value %v", res)
+	}
+	return n, nil
+}
+
 // deleteAllPendingCmd deletes all pending tasks from the given queue.
 //
 // Input:
diff --git a/internal/rdb/inspect_test.go b/internal/rdb/inspect_test.go
index 246ce4d..b2039cd 100644
--- a/internal/rdb/inspect_test.go
+++ b/internal/rdb/inspect_test.go
@@ -4210,6 +4210,105 @@ func TestDeleteAllScheduledTasks(t *testing.T) {
 	}
 }
 
+func TestDeleteAllAggregatingTasks(t *testing.T) {
+	r := setup(t)
+	defer r.Close()
+	now := time.Now()
+	m1 := h.NewTaskMessageBuilder().SetQueue("default").SetType("task1").SetGroup("group1").Build()
+	m2 := h.NewTaskMessageBuilder().SetQueue("default").SetType("task2").SetGroup("group1").Build()
+	m3 := h.NewTaskMessageBuilder().SetQueue("custom").SetType("task3").SetGroup("group1").Build()
+
+	fxt := struct {
+		tasks     []*h.TaskSeedData
+		allQueues []string
+		allGroups map[string][]string
+		groups    map[string][]*redis.Z
+	}{
+		tasks: []*h.TaskSeedData{
+			{Msg: m1, State: base.TaskStateAggregating},
+			{Msg: m2, State: base.TaskStateAggregating},
+			{Msg: m3, State: base.TaskStateAggregating},
+		},
+		allQueues: []string{"default", "custom"},
+		allGroups: map[string][]string{
+			base.AllGroups("default"): {"group1"},
+			base.AllGroups("custom"):  {"group1"},
+		},
+		groups: map[string][]*redis.Z{
+			base.GroupKey("default", "group1"): {
+				{Member: m1.ID, Score: float64(now.Add(-20 * time.Second).Unix())},
+				{Member: m2.ID, Score: float64(now.Add(-25 * time.Second).Unix())},
+			},
+			base.GroupKey("custom", "group1"): {
+				{Member: m3.ID, Score: float64(now.Add(-20 * time.Second).Unix())},
+			},
+		},
+	}
+
+	tests := []struct {
+		desc          string
+		qname         string
+		gname         string
+		want          int64
+		wantAllGroups map[string][]string
+		wantGroups    map[string][]redis.Z
+	}{
+		{
+			desc:  "default queue group1",
+			qname: "default",
+			gname: "group1",
+			want:  2,
+			wantAllGroups: map[string][]string{
+				base.AllGroups("default"): {},
+				base.AllGroups("custom"):  {"group1"},
+			},
+			wantGroups: map[string][]redis.Z{
+				base.GroupKey("default", "group1"): nil,
+				base.GroupKey("custom", "group1"): {
+					{Member: m3.ID, Score: float64(now.Add(-20 * time.Second).Unix())},
+				},
+			},
+		},
+		{
+			desc:  "custom queue group1",
+			qname: "custom",
+			gname: "group1",
+			want:  1,
+			wantAllGroups: map[string][]string{
+				base.AllGroups("default"): {"group1"},
+				base.AllGroups("custom"):  {},
+			},
+			wantGroups: map[string][]redis.Z{
+				base.GroupKey("default", "group1"): {
+					{Member: m1.ID, Score: float64(now.Add(-20 * time.Second).Unix())},
+					{Member: m2.ID, Score: float64(now.Add(-25 * time.Second).Unix())},
+				},
+				base.GroupKey("custom", "group1"): nil,
+			},
+		},
+	}
+
+	for _, tc := range tests {
+		h.FlushDB(t, r.client)
+		h.SeedTasks(t, r.client, fxt.tasks)
+		h.SeedRedisSet(t, r.client, base.AllQueues, fxt.allQueues)
+		h.SeedRedisSets(t, r.client, fxt.allGroups)
+		h.SeedRedisZSets(t, r.client, fxt.groups)
+
+		t.Run(tc.desc, func(t *testing.T) {
+			got, err := r.DeleteAllAggregatingTasks(tc.qname, tc.gname)
+			if err != nil {
+				t.Fatalf("DeleteAllAggregatingTasks returned error: %v", err)
+			}
+			if got != tc.want {
+				t.Errorf("DeleteAllAggregatingTasks = %d, want %d", got, tc.want)
+			}
+			h.AssertRedisSets(t, r.client, tc.wantAllGroups)
+			h.AssertRedisZSets(t, r.client, tc.wantGroups)
+		})
+	}
+}
+
 func TestDeleteAllPendingTasks(t *testing.T) {
 	r := setup(t)
 	defer r.Close()
diff --git a/internal/testutil/testutil.go b/internal/testutil/testutil.go
index dc249f8..d22904e 100644
--- a/internal/testutil/testutil.go
+++ b/internal/testutil/testutil.go
@@ -605,6 +605,18 @@ func SeedRedisLists(tb testing.TB, r redis.UniversalClient, lists map[string][]s
 	}
 }
 
+func AssertRedisSets(t *testing.T, r redis.UniversalClient, wantSets map[string][]string) {
+	for key, want := range wantSets {
+		got, err := r.SMembers(context.Background(), key).Result()
+		if err != nil {
+			t.Fatalf("Failed to read set (key=%q): %v", key, err)
+		}
+		if diff := cmp.Diff(want, got, SortStringSliceOpt); diff != "" {
+			t.Errorf("mismatch found in set (key=%q): (-want,+got)\n%s", key, diff)
+		}
+	}
+}
+
 func AssertRedisZSets(t *testing.T, r redis.UniversalClient, wantZSets map[string][]redis.Z) {
 	for key, want := range wantZSets {
 		got, err := r.ZRangeWithScores(context.Background(), key, 0, -1).Result()