Maruti Suzuki India reopened its Manesar plant amid heavy security today, a month after a lockoutwas declared due to the violence in which one senior company official was killed and 100 others injured.Haryana Police has provided 500 personnel, out of which 200 are inside the plant and 300 in areas around it.Besides, the company has also formed its own special force numbering 100, which includes ex-service men.The company had declared a lockout at Manesar plant on July 21 following the worst ever violence in its history on July 18. The plant suffered damages estimated to be less than 10 crore rupees, while the overall production loss during the lockout was pegged at around 1,400 crore rupees.MSI has also decided to terminate services of 500permanent workers, who were allegedly found to be involved in violence inside the plant.