The FBI has issued its first-ever poster in a Native American language, seeking information in Navajo on the brutal keeling of an elderly man six years ago on the New Mexico portion of the vast Navajo Nation reservation.

Wilson Joe Chiquito, a 75-year-old medicine man, was beaten to death at his home in the community of Counselor -population 500 - on Valentine's Day in 2014.

The FBI recently released the poster that offers a reward of up to $10,000 for information leading to an arrest and conviction in the cold-case homicide.

It has been shared on social media and posted in Navajo communities, grocery stores and trading posts, said Navajo Police Chief Phillip Francisco.

This image shows the first poster the FBI has issued in a Native American language, seeking information in Navajo on the murder of Wilson Joe Chiquito six years ago in New Mexico

This image shows the English-language version of the poster. Chiquito, 75, was beaten to death at his home in the small community of Counselor in February 2014

'Having it in both languages, it obviously helps the ability to get tips,' he said. 'It's a positive thing and it shows the FBI's dedication to helping solve crimes on Navajo by embracing the culture and the language.'

Francisco wasn't aware of any new tips that authorities have received based on the Navajo-language poster but said 'any small detail can help out.'

James Langenberg, special agent in charge of the Albuquerque division of the FBI, said FBI employees who speak Navajo helped translate the information for the poster.

'We already work closely with the Navajo Nation Division of Public Safety, but we hope this effort will improve our communication with the rest of the Diné,' Langenberg said, using a term that means 'Navajo people.'

Counselor is located on the Navajo Reservation in New Mexico and has a population of just over 500 people

The FBI has not translated posters into any Native American language beside Navajo, said FBI spokeswoman Manali Basu.

'The FBI plans to continue translating regularly in order to ensure we are receiving any and all information possible that may lead us to the perpetrators of these crimes and bringing them to justice, the agency said.

Chiquito, a traditional healer, was found dead outside his cottage by his grandson. The cause of death was blunt force trauma to his head.

'We just want justice for my grandpa,' Chiquito's granddaughter, Marshie Pablo, told Navajo Times on the eve of the first anniversary of the man's killing in 2015.

The Navajo Nation spans parts of New Mexico, Arizona and Utah. It covers more than 27,000 square miles, making it larger than the state of West Virginia.