It's a bad transcription. I listened to the original audio recording and the reporter clearly says, "they've got their hands up in the air." So those people surrendered. There are other mistakes in the transcript. The writer even invented a word or two, it seems.

Sounds like they are surrendering to police... the hands are "out in the air" to show there's no weapons in their hands. The hands are "out", not "hidden".

Thank you very much！^_^ You are right！ I've listened to the news report again and I heard it was "they got their hands up in the air." So the transcript was wrong～Maybe it's just because the speaker spoke so fast that it's hard to tell which word he was saying exactly... Anyway, it was a great help and thank you very much！

I haven't come across this expression before. Are you sure it wasn't "..they have their hands up in the air..."? Having one's hands up in the air is a sign of surrender. As I have not seen the clip you are talking about I cannot really say anything more.

This depends on the context, can sibolizar victory, can symbolize a sign and wanting to call attention in the worst hipótes can symbolize a robbery. Always observe the context to understand better.