* If I'm not mistaken the NBI agents were wearing masks to protect thier identities, and some of them do on occasion do some undercover work. What good are they as undercover agents when they are seen in news footage or in the newspapers.
* Reporters are held back for their own safety, since there's a a high possibility of a firefight between criminals and the authorities. Ask yoursel this, if the NBI agents lets reporters in and they are killed or are shot during the ensuing firefight, who do you think the reporters are gonna blame?