Chinese authorities have detained 16 fishermen after hundreds of people protested the construction of a sea marina in a southern Chinese port city.

Police in the city of Beihai said Sunday that they detained four people on Thursday and another 12 people on Friday. They say they also dismissed nearly 200 protesters who shouted slogans and held up banners.

The fishermen are upset that the new marina would take up a public beach that has long been used for their trade, according to a local resident who only gave her last name Pan.

Mass incidents such as protests of public projects are on the rise in China, and authorities are increasingly resorting to force to dismiss demonstrations and detain protesters on the ground of disturbing public orders.