The Maine State Fire Marshal’s Office and Portland Fire Department are looking into what may have caused the blaze at Custom House Wharf, although they said they may never figure out what

Flames and smoke were visible around the Casco Bay Friday night, leaving smokey remains on one of Portland’s iconic wharfs.

A three-alarm fire ripped through the Custom House Wharf in Portland Friday night and left two firefighters injured. The fire was first reported at 5:33 p.m. by a crew on the Casco Bay Ferry called in the fire but did not know exactly what was burning.

The State Fire Marshal's Office is investigating the Friday fire that devastated businesses along Custom House Wharf in Old Port.

The investigation continues into a fire that tore through the historic Old Port waterfront in Portland, Maine, on Friday, damaging aging buildings and several boats. Flames and smoke spread easily through structures along the Custom House Wharf,

According to Deputy Chief John Hendricks, one firefighter sustained minor injuries. The fire also damaged and sunk one boat on the waterfront. The Chief says that due to the extensive damage the investigation into what caused the fire will take some time.

Portland Fire and Rescue is reminding residents that personal fireworks are illegal in the city and offering an online reporting tool for New Year's Eve.