Mumbai/IBNS: The Maharashtra Navnirman Sena (MNS) workers were on Tuesday morning detained by police here after they took out a march to oppose the protests against the outfit's assault on a shopkeeper for not speaking Marathi, media reports said.

In dramatic visuals, the MNS workers were picked up and put into police vans.

The detained workers questioned the police why the traders, who protested against the slapgate, were allowed to carry out agitation while they were not.

Responding to the detention, Maharashtra Chief Minister Devendra Fadnavis said as quoted by NDTV, "In Maharashtra, everyone has the right to take out a protest march. Anyone can do after taking police permission.

"There are traffic issues, stampede risks etc. The police commissioner told me they (MNS leaders) were asked to change the route, but they were adamant. So police stopped them."

In a strict message, Fadnavis last week said Marathi should be respected but thuggery in the name of language won't be tolerated in the state.

Speaking to the reporters, Fadnavis said, "Marathi should be respected but thuggery in the name of any language won't be tolerated. Police have filed an FIR and acted against the kind of incident that has happened recently.

"We respect Marathi but not at the cost of disrespecting any other language. Strict actions will be taken if someone takes law into their hands."

In a video which went viral on social media, some of the workers- identified as belonging to Raj Thackeray's MNS- were seen thrashing the 48-year-old shopkeeper, named Babulal Khimji Chaudhary, who struggled to respond to the onslaughts.

Reportedly, the workers questioned the shopkeeper over not speaking in Marathi. The shopkeeper tried to explain that he didn't know Marathi was compulsory and also he lacked knowledge in the language.

When the MNS workers asked the shopkeeper which state he was working in, the shopkeeper responded, "Maharashtra".

When the protesters asked about the language spoken in Maharashtra, the shopkeeper said, "All languages are spoken here."

The workers got angry at the shopkeeper's response and started slapping him one by one.

One of the men who slapped the shopkeeper defended their actions saying "it was his attitude that led us to slap him".

Speaking to NDTV, MNS worker Amol Patil said, "If he had spoken to us properly, he would not have been slapped. It was his attitude that led us to slap him. Of course we know many people don't know Marathi. But there is a decent way of replying when asked."

"Had he (shopkeeper) said, 'I will learn Marathi, maybe one of you can teach me', we would have been glad to help. It is all about how they behave with us when we ask them if they speak Marathi."