Amnesty International's report on the Manus Island shooting and concessions from PNG police have made clear Peter Dutton's catastrophic failure to keep people safe as well as his disgraceful dishonesty.

"The report and PNG police have made it clear that bullets were fired upon the detention centre, contrary to Dutton's claims," Greens Immigration spokesperson Nick McKim said.

"People in his care are being shot at and he has not lifted a finger to keep them safe. This is an appalling act of neglect."