Six persons, including two workers of the Congress and four activists of MNS, were arrested in connection with the incident today.
The incident occurred in Kannamwar area of the suburb last night when the MNS workers were distributing pamphlets for installing Marathi signboards at their shops when a scuffle broke out between them and some shopkeepers, a police official said.
"Shopkeepers assaulted the MNS workers in which three of them were grievously injured, while one worker sustained a skull fracture," the official said.
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