A China-bound hovercraft (search) carrying more than 160 people collided with a Chinese freight boat in Hong Kong waters on Thursday, injuring 94, with four people in serious condition, the government said.

The remaining injured were either stable or still being assessed, said a government spokeswoman who only gave her surname, Kan.

She said the nature of their injuries wasn't immediately known. It also wasn't clear how many people were hurt on each vessel.

The two boats collided in waters northwest of the Hong Kong island of Tsing Yi (search), Kan said. The passenger boat, which was carrying 156 passengers and nine crew members, was traveling to China's Nansha Island (search) and the city of Panyu, she said.

The cause of the accident wasn't immediately known, Kan said.