Over 100 people have been arrested in connection with the violence by a group of retrenched employees in a factory here in which the head of the company was bludgeoned to death.

One hundred thirty-six people were charged with rioting and murder in connection with the killing of the India head of the Italy based company, a senior police official said on Tuesday.

L K Chaudhury, CEO and managing director of Cerlikon-Graziano Transmissions India Pvt Ltd in Udyog Vihar of Greater Noida, was killed on Monday when the agitating workers turned violent and reportedly beat him up after a
meeting called to resolve the dispute between them and the management failed.

The incident took place around 12.30 pm when about 200 dismissed employees barged into the factory premises and allegedly hit Chaudhury on his head with a hammer from behind, Noida police sources said quoting eye-witnesses.

Over 30 people were injured as the agitated crowd ransacked the factory. Some vehicles and furniture were also damaged in the incident.

The workers were dismissed about two months back and were protesting since then.

Meanwhile, companies in the Greater Noida industrial area have increased the number of security guards following yesterday's incident.