The number of cases of chagassan in India has nearly doubled in the past six months, a rise that has triggered a crackdown on travel and smuggling by local and foreign nationals.

In recent weeks, at least five people have died after eating food from restaurants, shops and cafes in northern India.

Authorities have closed almost every railway station and several airports in the southern states of Kerala, Odisha and Andhra Pradesh.

More than 20,000 people have been detained in the country’s largest states of Gujarat, Andhra, Karnataka and Tamil Nadu.

The authorities say they are fighting chagasa through a series of programmes to curb smuggling.

But some people are still caught by the government.

The Chhattisgarh government said it was targeting “traffickers” and smuggling gangs in the state, which accounts for more than one-fifth of the countrys total number of chagnets.

In Kerala, the state health department said it had arrested over 10,000 suspected criminals in recent months.

The number has more than doubled in recent weeks.

“There are people who are hiding from the law in various places of Kerala and in our district, but they are not in jail, and they are being arrested for a very small amount of money,” health minister Kavitha Srivastava said on state television.

The government has also said it has launched a crackdown against illegal foreign workers, with authorities in the north of the state raiding several hotels in recent days to arrest people who were staying in hotels booked for foreign workers.

Last week, the Supreme Court rejected a plea by the Kerala government seeking a ban on foreign workers staying in the city.

The court said the Kerala authorities could not ban foreign workers in their state “for a number of reasons” including that foreign workers would be “brought in illegally”.

But the Supreme Bench of Kerala said the government could “not take any steps to prohibit foreign workers from staying in Kerala”, adding that “the Kerala government could not provide adequate legal safeguards”.

The government is also cracking down on “mafias” operating in Kerala, a government statement said.

“In order to bring the situation under control, we have taken some measures to curb the activities of ‘mafiosi’ and other illegal persons and organised crime syndicates,” the statement said, without giving details.

The Kerala government also said in January that it would set up a task force to tackle the issue of “mafia”, which it said was involved in a string of killings and robberies across the state.

The ruling Communist Party-led government said in November that the government was “not ready” to declare a “war” on mafia.

But the authorities have been criticised for not taking action against the syndicates, which include a number linked to underworld figures, including mafia boss and former president and now-dictator M.L. Keshubhai Patel.

Last year, police said the police had arrested 15 members of Patel’s “Gurudwaras” gang, which had been operating in the eastern state of Kerala.

In May, a gang member who was involved with a murder in Kerala’s western state of Andhra had his arrest warrant revoked by the court.