Delaware Authorities Investigating Multiple Arsons

State fire marshal’s investigators are probing five separate arsons that caused heavy damage to buildings and vehicles in northern New Castle County.

Authorities said the fires were set 2 a.m. and 5:30 a.m. Wednesday and targeted at two vacant dwellings, two pieces of construction equipment, and a trash container.

Total damage was estimated at $400,000.

The first two fires involved a dump truck and another piece of construction equipment in the Centre Road area of Wilmington. They were followed a trash container fire on West Salisbury Drive, and house fires on Pennewell Drive and Newport Gap Pike.

One firefighter battling the Newport Gap Pike blaze was treated for heat exhaustion.