New Delhi: Maruti Suzuki's production at its main plant in Gurgaon dropped further due to component supply constraints because of the 6-day long strike at its Manesar plant, and it rolled out just about 20 per cent of the normal daily output on Wednesday.

The company has been hit hard, not only by strike of its own workers, but also due to the supply shortage of engines and transmissions from Suzuki Powertrain India Ltd (SPIL).

Meanwhile, various trade unions and labour bodies of the factories located in the Gurgaon-Manesar-Dharuhera-Bawal industrial belt have called for a joint protest rally on Thursday in front of Maruti Suzuki India's (MSI) Manesar plant in support of striking workers of the carmaker.

"There was a further drop in production at Gurgaon plant on Wednesday. The Gurgaon plant produced only 600 vehicles as against normal daily production of 2,800 vehicles," MSI said in a statement.

The Manesar plant continues to remain captive in the hands of striking workers and no production took place on Wednesday, it added.

Workers at SPIL and Suzuki Motorcycle India Pvt Ltd have gone on a simultaneous strike in support of their colleagues at MSI Manesar plant.

Meanwhile, MSI Chairman R C Bhargava said the company's Japanese parent Suzuki Motor Corp has expressed concern and unhappiness over the ongoing labour problems.

"Suzuki has expressed concern over what is happening here and it is particularly unhappy that the workers have reneged on their agreement," Bhargava said.

On the steps that the management is taking to resolve the issue, he said, "The ball is not in our court. We can only speak to them (workers) if they are ready. It is very difficult to talk to the workers right now as they have a very aggressive attitude."

Stating that the workers have been influenced from outside, Bhargava said: "I hope better sense prevails."

On the other hand, all the unions in the region held gate meetings in their respective factories today. A public meeting will be held at 3 pm tomorrow in front MSI's Manesar plant gate and it will be followed by a rally in IMT, Manesar.

"There is no sign of positive development to the ongoing stalemate at Manesar. The management and the government are not taking any initiative," AITUC Secretary D L Sachdev said, adding that tomorrow's protest is to show solidarity with the striking workers of MSI.

CITU Haryana State President Satvir Singh said the protest meeting and the rally are supported by trade unions such CITU, AITUC, HMS and AIUTUC.

On Tuesday, all major national trade unions cutting across party lines -- AITUC, CITU, HMS, INTUC, BMS, AIUTUC, TUCC, AICCTU and UTUC -- lashed out at the company management, accusing it of "high-handed provocative activities" and said not allowing casual workers to join duty is "an absolute act of vengeance".

Workers at MSI's Manesar plant went on a stay-in strike on Friday afternoon, completely affecting production at the plant, demanding the reinstatement of over 1,000 casual staff
and 44 permanent employees, who were suspended during the standoff that started on August 29.