Tenants should pay for damage, right?

[Karen S.]

Late last night I received a call from one of my tenants telling me that one of the other units had a fire in their apartment (this is a 4-plex) 2 days ago. She said there was an explosion and she didn't know what happened but 2 of the fire extinguishers outside the building have been used. She said that she saw them pulling out carpet, etc. I will be going there tomorrow to do an inspection. I tried to contact the tenants and asked if something happened but they won't answer and I'm sure they are trying to conceal whatever damage I might find before I get there tomorrow. I can charge them for everything they damaged or do I need to go through my insurance company? It's petty but can I charge them for the fire extinguishers?