Halifax Police have issued a warning to the public that a stolen motorized bicycle could pose a danger to anyone who uses it improperly.

The unique Norco Bush Pilot mountain bike, equipped with a Zenoah GoPed motor, was stolen sometime late Wednesday or early Thursday morning from in front of a home on Cabot Street.

The bike is likely the only one of its kind in Halifax and was part of a locally supported commuter project studying fuel economy and low emissions.

Police say the engine requires a specific fuel and without it, it could possibly explode and cause someone injury.

The owner is offering a $250 cash reward, no questions asked, for the bike's return. In an appeal, posted on the website kijiji, he says the prototype engine "will grenade violently" if fueled incorrectly.

The bike is described as black, with grey, triple-clamp forks, with a front disk brake. It has a black front rim and older cupped, stainless steel rear rim. It has heavy, 12-gauge spokes.

The engine is in a red plastic shroud, marked 'Zenoah GoPed' with an aluminum 'ADA Juice Box' intake, inset in the plastic shroud, in addition to a small box muffler with a pull start.

Anyone with information about the theft is asked to contact police or Crime Stoppers.