Summary: Snohomish County Fire crews responded to a commercial fire alarm at 5623 186th Place Southwest, unit A6. Upon arrival, they found a two-story townhouse with the alarm sounding. Residents of the affected unit were not home, and initial attempts to access the unit with a key were unsuccessful. Firefighters proceeded to use a keybox to gain entry and attempted to reset the alarm system. The situation was investigated and resolved without escalation.