Durham NC Fire Department responded to a reported fire in a duplex at 1554 hours on 10/10/00. First due E-1 found heavy fire on both sides of the duplex. The fire went to two alarms before it could be contained. The cause is under investigation. The duplex was severely damaged. Five handlines were in operation. The following units responded: E-1, E-11, E-2, E-3, E-4, E-5, L-1, L-14, Squad 1, Battalion 1, Safety Officer, Mobile Support 1.