Hartford, Ct responded to 22-24 Hamilton St at 1925 hours for a report of a fire on floors 2 & 3. A second source reported people trapped. Engine 15 reported a working fire on their arrival. District 1 struck the 2nd alarm on his arrival. One child was rescued and transported to the hospital along with a firefighter and police officer. Very soon after companies arrived they had a partial collapse of the rear and floors 2 & 3 of the B side. Fire also extended to the D side exposure along with numerous cars and trees in the rear yard. Three tower ladders were put to work along with numerous landlines.