A second juvenile has been arrested in connection with a Lewisville fire Wednesday night.The Watonwan County Sheriff's Office says a 12 year old boy and a 13 year old boy are now in custody.Authorities say the boys are from Lewisville and were seen in and around the buildings just before the fire was reported.Sheriff Gary Menssen says one was arrested Wednesday night...The second was arrested Thursday afternoon.The fire destroyed three buildings in Lewisville and injured three firefighters.