Concerns raised for Manus detainee

Asylum seekers and refugees on Manus Island have expressed grave concerns for an Iranian man who they fear is becoming delusional.

Detainees say the 28-year-old has twice harmed himself in recent days and, while he has been treated in hospital for his physical injuries, there is no mental health support available on the island.

"We are extremely concerned for the Iranian man's welfare - he has a critical mental condition and is at serious risk," Refugee Action Coalition spokesman Ian Rintoul said on Monday.