Like many natural resources the amount of sand around is finite but, despite this, the illegal mining of the unremarkable material has been booming in India.

Indian police have recently arrested two men suspected of kidnapping and killing a journalist in the country. Sandeep Kothari was abducted and beaten to death by a group of men, with alleged links to a "sand mafia," who then burned his body and left it beside railway tracks, earlier this month.

According to members of the Mr Kothari’s family, the journalist had filed a court case against the owners of mining companies to stop sand mining.

Sand mining allegedly destroys ecosystems and in the US it is blamed for the erosion of beaches, water, and air pollution. Since 2005, over 20 Indonesian islands have been lost due to the effects of sand mining, Wired reported.

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On 22 June, authorities in Mune, close to Mumbai, confiscated 65 vehicles involved in the illegal transportation of sand. Only days before, the chief minister of Maharashtra, Devendra Fadnavis, had ordered authorities to wipe out the sand mafia in the state.

In many cases, the authorities “Have to travel to remote spots at night to bust illegal mining activities,” a senior official told The Times of India.

“They often face stiff opposition from people involved in illegal mining. There have been cases of physical assaults during raids,” he added.

India’s Supreme Court has this year warned that sand mining is undermining bridges and disrupting ecosystems all over the country, killing wildlife in the process. Regulations, however, are not rigorous enough, nor enforced to prevent its occurrence.

Battles between sand mafias have reportedly killed hundreds of people in the past few years, a death toll which includes the likes of police officers and government officials.

According to a leading environmental lawyer in India, Ritwitck Dutta, the scale on which sand is required, means it is extremely difficult to control or prevent illegal mining.

“The fundamental problem is the massive use of cement-based construction,” Mr Dutta told Wired.