I was helping someone with grenades and I wandered over towards the edge and found a door that I don't remember being able to open before...
And inside there were 4 of each container type and they all seemed "searchable". This would make the grenade quest go much easier and also gives you a room to duck in to regain some health. It's a bit tricky to get to (usually a Veteran and an Officer are close enough to attack if you go for it and a Thug who will usually just stand there) but once you're inside...
EDIT--- Never mind apparently they don't help-see one of the replies below. It's still a good room for hiding for a few.
Note: the lower portion of the room doesn't have any stairs but if you jump on the crate, you can jump out from there.