Notorious serial killer Ivan Milat has died in prison from terminal oesophagus and stomach cancer.

Milat, 74, died at Long Bay Hospital at 4.07am on Sunday, Corrective Services NSW said in a statement. Milat had 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.