The Alappuzha North Police on Tuesday submitted a report before the High Court on the recent attack on a shopowner at Thalavady near here.
The court had sought the report while considering the case on Monday. It had also criticised the police for its failure to take action against trade union workers who had carried out the attack.
Alappuzha District Police Chief Uma Behra said the North Police had registered a case and arrested four CITU workers - Tharevelil Raju, Sambasivan, K Vijayakumar and T K Purushothaman - in connection with the attack.
Last week, the Gino Traders, a hardware and cement shop at Thalavady, was ransacked by CITU workers. The workers also attacked the shop owner, K M Binumon, and his father P Antony. Computers and other materials in the shop were damaged in the attack. The union workers had been demanding more wages for unloading of material, but Binu was not willing to do so.
The Loading and Unloading Labour Welfare Board had settled the matter, but the workers later overrode the negotiations.
When things got worse, Binu approached the High Court which permitted him and his family members to unload material in their shop. But when they were unloading the material, over 15 CITU workers came and ransacked the shop and attacked Binu and his father.
Binu alleged that the police reached the spot only after the attack.