Indeed, the general was sent to control it. As for why the mutant still appeared in the street, in front of the camera, and in public, there were two reasons.
One was that the general failed to control the mutants and let them escape.
Second, the military that controlled the mutants was completely annihilated and out of defense, so that these mutants could rush to the street and attack innocent citizens.
But now all the people on the spot had no extra energy to consider the citizens outside. They only had one thought.
Run!
"Oh my God! Those mutants are too frightening and very infectious. Have you seen that? The people bitten by those mutants just got up in half a minute. There are so many people outside. If they sneak in, we are all over!"
"Yes, we have to run! We can't stay here any longer. It's dangerous here. It's not safe here. Hurry up and go!"