Two crew members were hurt after a small geophysical surveying aircraft was forced to make emergency landing on an unfinished highway in central China Thursday evening, local officials said.

The plane, manufactured and owned by a general aviation company based in southern Chinese city of Zhuhai, did not cause ground damage when it hit the highway in an urban district of Tangshan city, Hebei province, officials said.

The injured pilots were rushed to a local hospital.

The authorities are probing the cause of the emergency landing.