A 27-year-old man from Dartmouth is in his hospital with injuries that could take his life after a motorcycle crash Sunday evening.

Halifax Regional Police say he was one of two drivers on sport bikes going north in Windmill Road last night at about 8 o'clock.

They say the man lost control through a turn, struck a fire hydrant and sheared it off.

Investigators say they believe speed was a factor.

Police now want to speak to the other driver, who did not stay with the badly injured man.

They believe he stopped, briefly, to look at the scene before driving away.

The injured man is being treated in the QEII Health Sciences Centre in Halifax.