DETROIT — The Latest on a fire that struck a boat once used to ferry passengers to an island amusement park in the Detroit River (all times local):

5:50 p.m.

Investigators say welding may have sparked the fire that struck a boat that once carried passengers to an island amusement park in the Detroit River.

The SS Ste. Claire caught fire about 11:30 a.m. Friday while docked at a marina east of downtown Detroit. The Ste. Claire is one of two steamships that traveled for decades between Detroit and Boblo Island in Canada, about 15 miles (24 kilometers) away. The amusement park closed in 1993.

The cause of the blaze is under investigation, but Detroit Deputy Fire Commissioner Dave Fornell says welding being done on the mostly wooden boat was suspected.

Police and fire officials say it's doubtful the aging vessel can be salvaged, but owner Ron Kattoo said he hopes to rebuild the boat if possible.

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3:15 p.m.

Police and fire officials say it's doubtful that a boat that once carried passengers to an island amusement park in the Detroit River can be salvaged after the vessel caught fire at a marina.

The blaze aboard the SS Ste. Claire was under investigation Friday after the fire broke out around 11:30 a.m. northeast of downtown Detroit.

The Ste. Claire is one of two steamships that traveled for decades between Detroit and Boblo Island in Canada, about 15 miles (24 kilometers) away. The amusement park closed in 1993.

The Ste. Claire and SS Columbia made their last runs in 1991. They were designated National Historic Landmarks in 1992.

The Columbia was moved by tugboat in 2014 to Toledo, Ohio, for repairs before heading on to New York state.

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12:59 p.m.

A boat once used to ferry passengers to an island amusement park in the Detroit River has caught fire at a marina where it's docked.

WDIV-TV reports that flames engulfed the boat Friday at Riverside Marina northeast of downtown Detroit and that fire crews were dousing the vessel with water.

The cause of the blaze was not immediately known.

The boat is one of two that traveled for decades between Detroit and Boblo Island in Canada, about 15 miles (24 kilometers) away. The amusement park closed in 1993.

The SS Ste. Claire and SS Columbia made their last runs in 1991. They were designated as National Historic Landmarks in 1992.

The Columbia was moved by tugboat in 2014 to Toledo, Ohio, for repairs before heading on to New York state.