NJ boardwalk fire likely caused by electrical wiring problem

(CNN) -- An electric wiring problem likely caused the fire this month that damaged a massive swath of New Jersey's boardwalk, which had been freshly rebuilt after Superstorm Sandy wrecked it last October, authorities said Tuesday.

An investigation ruled out human involvement in the fire, Ocean County Prosecutor Joseph D. Coronato said.

A team of investigators agreed that a failure of electrical equipment and wiring under the boardwalk contributed to the blaze. The wiring was installed in 1970 and "compromised by Sandy floodwaters," investigators said.