Yes. If they see blood, there WILL be a frenzy.
Take the bird out NOW if it is not already dead. They will continue to eat her alive if you do not.
They need more enrichment right now. Hanging treat feeders, things to scratch through and eat, flock blocks, dust to bathe in, places to explore, hay/straw to dig through. Free ranging will help tremendously. Increase their protein, especially if in moult - scrambled eggs are great, as is tuna and high protein feed. In fact, put up multiple feeders/waterers so there is no fighting.
Make sure they aren't over-crowded. This is SO important - it will make for some highly aggressive chickens and easily escalates to cannibalism.