"A decision to suspend some of the members pending inquiry, for serious misconduct, was taken earlier in the week. This is in line with the company's rules and regulations," TKM said in a statement here.
It did not specify the number of suspended workers.
Toyota Kirloskar Workers Union President Prasanna Kumar told PTI that suspended workers have not received any letter.
The government's talks with the management and union to break the impasse did not have any headway yesterday.
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The Japanese global firm's Indian joint venture's plants are located at Bidadi, about 30 km from here, with a capacity to rollout about 700 cars a day, with an installed production of 3,10,000 units annually.
Of the 6,400 employees, about 4,000 are union members and the remaining of them are on contract in both the factories.
Toyota holds 89 per cent equity in the joint venture, while the remaining 11 per cent is controlled by the Pune-based Kirloskar group.