Killer Milat returned to Long Bay jail

Notorious serial killer Ivan Milat is back in prison after spending 11 days in a Sydney hospital as he fights terminal oesophagus and stomach cancer.

Milat, 74, was taken back to Long Bay Prison on Tuesday after receiving treatment in a secure annexe at Sydney's Prince of Wales Hospital.

Milat has been undergoing chemotherapy since first being diagnosed in May.

The former road worker was sentenced in 1996 to seven consecutive life sentences for murdering seven backpackers whose bodies were found in makeshift graves in NSW's Belanglo State Forest in the 1990s.