The private security guard of a diamond polishing unit opened fire on the diamond workers who were violently protesting in Kumudwadi area of the city, police said.

Out of the seven workers who were injured in the 'private firing', one died in a city hospital, hospital souces confirmed.

"We have deatained the security guard who opened fire on the diamond workers," Bhavnagar distrrict superintendent of police Anupamsingh Gehlot told PTI.

Gehlot said that the situation is under control now after police canned and dispersed the agitating workers.

The agitating workers indulged in stone pelting and damaged some vehicles in Kumudwadi area, police said.

Diamond workers across the state started their protest yesterday for wage hike. The protest was organised following 20 per cent hike given to diamond workers of Surat.