Honda Motor Co. and General Motors Co. will jointly develop a fuel-cell vehicle under their envisioned tie-up on environmental technology, sources said Tuesday.

The companies were expected to unveil the plan on the development of the fuel-cell vehicle at a news conference in New York.

Honda Executive Vice President Tetsuo Iwamura and GM Vice Chairman Steven Girsky will hold the news conference Tuesday New York time, the automakers said without elaborating on details.