This industry comprises government establishments primarily engaged in fire fighting and other related fire protection activities. Government establishments providing combined fire protection and ambulance or rescue services are classified in this industry. Cross-References. Establishments primarily engaged in-- ? Forest fire fighting--are classified in Industry 115310, Support Activities for Forestry; ? Providing combined police and fire protection services--are classified in Industry 922120, Police Protection; ? Providing fire fighting services as a commercial activity--are classified in Industry 561990, All Other Support Services; and ? Providing ambulance services without fire protection service--are classified in Industry 621910, Ambulance Services.