STORY: Phillips and Pereira disappeared more than a week ago along a remote stretch of the Itacoai River in far western Brazil near the border with Colombia and Peru.
The faces of the two men were seen on demonstrators’ banners with the question 'Where are Dom Philips and Bruno Pereira?'
"We are here to defend life, indigenous people’s lives, to defend the environment and claiming for justice for our missing friends," protester Kamuu Dan Wapichana said.
Univaja, which has organized a non-stop search, discovered traces of the men and said the search area had been further reduced.
Brazilian federal police said that they expect to conclude this week the forensic analysis of a blood sample collected from the boat of a man suspected to be involved in the disappearance.