22-year-old Hardik's detention led to vociferous protests by community members at some places. The state administration said it has imposed a ban on mobile internet services in the state, ostensibly to curb spread of rumours.
Hardik accused the state administration of muzzling the voice of Patidar community after his detention.
No violent incident has been reported so far but Patel community members staged protests and tried to block roads at some places in Gujarat, police said.
"They were detained in the interest of law and order as they did not seek any permission from the state authorities to take out this rally. Hardik and others were taken to police headquarters after the detention," he said.
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Condemning the police action, the firebrand leader told reporters, after his detention, "The Gujarat government wants to muzzle our voice. They want to harass us. The government and the state police wants violence in the state. This act is against the spirit of democracy."
Earlier in the day, Hardik's associate and the convener of Patidar Anamat Andolan Samiti (PAAS) in Surat- Alpesh Kathiria had announced that they will take out a rally from Mangadh chowk in Varachha area of the city.
"We have decided to ban mobile Internet service in the state to tackle the law and order situation and to curb rumours across Gujarat for an indefinite period," Director General of Police PC Thakur said.