Fresh communal clashes erupted in western India on Wednesday as police and paramilitary forces tried to quell riots led by members of a farming caste demanding government benefits.

Authorities imposed a curfew Tuesday night in at least five cities in Gujarat state, after mobs attacked police with stones and sticks and burned vehicles. Cellphone communications were blocked in the state's main city of Ahmadabad to stop both rumors from spreading and gangs from coordinating their movements.

No casualties have been reported as the leader of the Patidars, also known as the Patel community for the last name they share, called a general strike Wednesday.

There were isolated clashes between protesters and police in several other cities in Gujarat, including the diamond cutting and polishing hub of Surat. TV stations reported that police fired tear gas to disperse the crowds in some parts of the state.

The Patels are demanding the special status given to many minorities in India, guaranteeing them a share of government jobs and school places.

They make up about 20 percent of Gujarat's 63 million people and say their livelihoods based on seasonal farming and small industry have become increasingly difficult amid India's agricultural malaise and rapid economic growth marked by high inflation.

India's constitution sets out affirmative action, called reservations, for India's lowest Dalit and untouchable castes to help them overcome centuries of discrimination. That has been expanded over the years to include several other relatively disadvantaged low caste groups.

Because reservations allow easier access to government jobs, schools and universities, they've become a huge political bargaining chip in this country of 1.2 billion, and over the last decade several groups have led violent protests to demand that they be counted at the bottom of the country's complex caste system.

On Tuesday, Patel leaders led a rally attended by 500,000 community members from across Gujarat. Later, police detained the group's 22-year-old firebrand leader Hardik Patel, triggering riots.

Hardik Patel called for a strike Wednesday across Gujarat, the state that Prime Minister Narendra Modi administered as chief minister for 12 years.

The streets of Ahmadabad were deserted and schools, colleges and businesses were closed. The only crowds were large groups of people gathered in the city's Patel-dominated neighborhoods.

Modi's successor as chief minister, Anandiben Patel, has urged members of her own community to maintain peace.

She has said that giving into the demands of the Patels was not possible because India's Supreme Court has mandated that state governments can set aside only 50 percent of jobs and school seats for economically backward groups and that existing low caste groups already fill those spots.