Anthropologists from the Peru government will try to make contact for the first time with an Amazon rainforest tribe, following the killing of a man in a bow and arrow attack.

The clan of Mascho Piro Indians have lived in an isolated area of the Manu National Park for decades, but have been increasingly spotted outside their territory looking for machetes and food.

A group from the tribe attacked the native Machiguenga community of Shipetiari in May, killing a young man with an arrow, and officials in Peru have now decided to try and talk to them in a bid to ease tensions between them and surrounding villages.

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First contact: Government anthropologists will try to make contact with the Mascho Piro Indians for the first time after the number of sightings of the allusive tribe has rocketed in recent years

Under threat: The Peru government wants to establish why the Mascho Piro tribe are leaving their area within the Man National Park more, after a young man was killed by members of the clan in a bow and arrow attack

Peru banned contact with the Mascho Piro and another dozen 'uncontacted' tribes, mainly because their immune systems carry little resistance to common illnesses.

But deputy culture minister Patricia Balbuena said it hasn't stopped villages, Christian missionaries and tourists all interacting with the tribe, often giving them clothes and food.

'The only ones who haven't been in contact with them are representatives of the state,' said Balbuena, adding they wanted to establish why the tribe have been emerging from the forest.

A team of doctors six hours upriver would treat the tribe if disease breaks out, he added.

Remote: Native Indians pictured in 2011 in the Brazilian Amazon forest, near the border with Peru. The Peruvian government bans contact with the Mascho Piro and other 'uncontacted' tribes

The Mashco Piro have historically rejected outsiders, surviving enslavement during Peru's bloody rubber boom in the late 1800s and later rebuffing missionaries.

But in the past year, the Mashco Piro have appeared in populated areas more than 100 times, especially along the banks of a river where they gesture to passersby.

Another local man was killed by the Mashco Piro in 2011, and a park ranger was wounded by arrows.

Authorities have said they cannot keep people from defying the contact ban because no penalty is attached.

Now, indigenous group FENAMAD warned that the decision to contact the Mashco Piro could legitimize the kind of unwanted interactions that have decimated isolated tribes in the past.

'Authorities should restrict boat transit and keep people from approaching,' said FENAMAD president Klaus Quicque.

Luis Felipe Torres, the head of the state isolated tribes team, said the government will not forcibly contact the Mashco Piro or try to change their nomadic lifestyle.