The 30 year old father of four was one of six Rangers killed on Sunday in an ambush in Congo's Virunga National Park.

It's Africa's oldest national park and is home to over half of the global population of critically endangered mountain gorillas.

The rangers, who protect them, are heavily armed and well trained but face frequent attacks.

Park director Emmanuel de Merode, who was himself shot and wounded in 2014, said his team remained focused despite the dangers and uh, must be song.

Of course we are in a situation which is extremely difficult, but which in no way represents a reduction in the conviction of all I, C.

C and staff to continue this effort.

Emma Abdo's brother spoke with Reuters.

Many book.

The family has lost a lot.

He led a lot of things, intervened in a lot.

He was a good advisor, a good worker and someone who enjoyed living with people.

We have a lot of grief with his death someone, the United Nations says.

More than 100 armed groups operate in eastern Congo, many of from groups that fought in civil wars around the turn of the century that resulted in millions of deaths from conflict hunger on disease.

Virunga is Africa's largest tropical rainforest reserve and covers 3000 square miles.