'Unknown' Peru Amazon tribe seen

A previously unknown indigenous group living in isolation has been found deep in Peru's Amazon jungle, a team of ecologists has said.

The ecologists spotted the 21 Indians near the Brazilian border as they flew overhead looking for illegal loggers.

Contact with outsiders can be fatal for isolated tribes people who have no immunity to many diseases.

Some groups have fled deep into the jungle to avoid contact with loggers and oil and gas prospectors.