Special Unit 2: The Wall

I hope you read this even though its been a year or more but I did watch it on youtube. the creatures that were in the walls came out to attack the people, where killed when the agents used the guitar when he plugged it in and the woman increased the sound. it sounded like a sonic high pitch that kllled the creatures. there were 4 but only saw 1 yellow bag. no human was killed.

youtube has both seasons. but they are cut up in parts like 1/5 2/5 3/5 4/5 and 5/5. I only watched the last 2, 4/5 and 5/5. the 5/5 showed the yellow bag.