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Bikas Das, Associated Press
An Indian woman cries after her relative died from toxic alcohol outside a hospital in Diamond Harbour, near Kolkata, India, Thursday, Dec. 15, 2011. A tainted batch of bootleg liquor has killed scores and sent dozens more to the hospital in villages outside Kolkata, officials said.

SANGRAMPUR, India — A batch of bootleg liquor laced with toxic methanol killed 102 people and sickened dozens more who purchased the illegal brew at small shops in eastern India, officials said Thursday. Police arrested seven suspected bootleggers.

Illegal liquor operations flourish across the slums of urban India and among the rural poor who can't afford the more expensive alcohol at state-sanctioned shops. The hooch, often mixed with cheap chemicals, causes illness and death on occasion, but rarely creates such mass carnage.

Day laborers and other poor workers began falling ill late Tuesday after drinking cheap booze from illegal shops near the village of Sangrampur, district magistrate Naraya Swarup Nigam said.

Groups of men gathered after their shifts to drink along a road side near a railway station late Tuesday when they began vomiting, suffering piercing headaches and frothing at the mouth, Nigam said. Angry villagers later ransacked the booze shops.

Arman Seikh, 23, rushed his brother-in-law to the hospital.

"He complained of burning chest and severe stomach pain last night," he told The Associated Press.

Police arrested seven people in connection with making and distributing the methanol-laced booze, West Bengal Chief Minister Mamata Banerjee said.

Police officials said the spurious liquor was from an illegal distillery in the village of Mograhat that supplies 70 shops in the area. Police are searching for the kingpin of the operation, who has fled, they said.

Alcohol for drinking is made from ethanol, whereas highly toxic methanol — a clear liquid that can be used as fuel, solvent or antifreeze — can induce comas and cause blindness and is deadly in high doses.

Anwar Hassan Mullah brought six sickened people to a hospital, and all of them died, he told NDTV news channel. He blamed police for turning a blind eye to bootleggers who spike their alcohol to boost its kick.

"It's a very sad thing that this has happened," Mullah said. "Why don't the police stop this? I cannot understand. What connection do they have (to the bootleggers)?"

By Thursday morning the death toll had skyrocketed to 102, and dozens more remained hospitalized, Nigam said.

Banerjee promised a crackdown.

"I want to take strong action against those manufacturing and selling illegal liquor," she said, according to Press Trust of India. "But this is a social problem also, and this has to be dealt with socially also along with action."

Despite religious and cultural taboos against drinking among Indians, 5 percent — roughly 60 million people, the population of France — are alcoholics. Two-thirds of the alcohol consumed in the country is illegal hooch made in remote villages or undocumented liquor smuggled in, according to The Lancet medical journal.

The deaths came just days after more than 90 people were killed in a hospital fire in nearby Kolkata that led to the arrest of the facility's directors for culpable homicide.

In the latest tragedy, victims had purchased the illegal booze for about 10 rupees (20 cents) a half liter, less than one-third the price of legal alcohol, at shops near Sangrampur, about 30 kilometers (20 miles) south of Kolkata, the city formerly known as Calcutta.

Illicit liquor is a hugely profitable industry across India, where bootleggers pay no taxes and sell enormous quantities of their product, said Johnson Edayaranmula, executive director of the Indian Alcohol Policy Alliance, an organization that fights against alcohol-related problems.

The bootleggers, working in homes, hidden warehouses and even in forests, can turn 1 liter of genuine alcohol into 1,000 liters of bootlegged swill with chemicals and additives that usually cause no harm, but on occasion can lead to tragedy, he said.

Every week, one or two people across the country die from tainted liquor, he said. In 2009, at least 112 people died from a toxic brew in western India.

"People don't know what they are drinking," he said. "It's all easy money, big profits. No one is bothered by the health or social consequences."

The trade is allowed to flourish despite strict laws against spurious liquor because corrupt police, local officials and tax authorities all get a cut of the profits, he said.

"Many people are getting a share out of it, so who is going to take action against these people," he said.

Associated Press writer Manik Banerjee contributed to this report.