A321
Flight Crew Instrument; Flight Crew Multiengine; Flight Crew Air Transport Pilot (ATP)
Situational Awareness
Aircraft Equipment Problem Less Severe; Ground Event / Encounter Other / Unknown
Aircraft Aircraft Damaged; Flight Crew Overcame Equipment Problem; General Evacuated
Aircraft
After shutdown checklist was completed; I deplaned to go to restroom and get a snack. When I came back to the gate the agent asked me if I knew about the flat tires. I said no. When I saw the Captain in the jet bridge he told me that our left brake fan(s) caught fire after I left and they deplaned everyone. The fire department was called. The fire and sparks were out but both left tires were flat.  We noticed the left outboard tire was a little over 400C when we taxied clear of the active. So; we turned on the fans. Taxi to gate was normal with no odd indications.
Arrival at the gate both left main tires blew out. Smoke and sparks were seen. I called for a deplaning. Fire department was also called. Aircraft was deplaned. No other factors. Apparently; a brake froze.
A321 reported the left main gear brakes froze while taxiing in and caught fire so the aircraft was evacuated at the gate. The fire was extinguished and both left tires were flat.