A Christian-run refugee camp in the Philippines has been torched, leaving at least five injured, including two children.

The incident took place early on Wednesday morning.

"At least three men poured gasoline on the tent before lighting it," Piya Macliing Malaayao, secretary-general of the tribal grouop Katribu, told UCA news.

An initial investigation by authorities has labelled the fire "intentional", according to an urgent alert sent by the Save Our Schools Network, based in Mindanao.

The local fire service told media its initial investigation pointed to arson as the cause of the almost simultaneous fires that broke out on opposite ends of the Haran Misson House of the United Church of Christ in the Philippines. 

The camp, which stands within the compound of the church in the southern Philippine city of Davao, has been home to around 700 indigenous people, who were displaced by military operations in Davao del Norte, Bukidnon and Surigao del Sur provinces.

"We condemn the violence against our tribal people and the attack on the church," said Nardy Sabino of the Promotion of Church Peoples Response.

Isagani Zarate of the Nation First Party has suggested the incident was a consequence of the government's inaction over the violence against the tribal people which led to their fleeing in the first place.

"The arsonists violated the sanctuary provided by the church to a group already forced to flee from their communities by relentless military operations," said Antonio Tinio of the Teachers Party.

In July 2015, the head of the Committee on Indigenous people in Congress, Nancy Catamco, attempted to forcibly eject refugees from the church.