Natsu skidded to a stop when she heard a click coming from where Griff had slid to. And the yell that there was gun powder, and she quickly made a small area hiding behind a wall and producing a strong ball of ice around her that melted at the flames around it, leaving her unharmed after the blast wore off. 

Then a voice shouted out demanding what was going on. Ah great. Probably the second hand woman to the head honcho. "Of course I can answer." She said looking at the damage wincing. That would take a long time to rebuild. "I was chasing the criminal who must have had an explosive that mixed in somehow with the gunpowder." She said.