Police have charged two men over the death of a 14-year-old boy in central Victoria on Saturday morning.

The 14-year-old and his stepfather had gone to the aid of two teenage girls in the town of Scarsdale, west of Melbourne, after one of them received a threatening phone call early yesterday morning.

A fight broke out outside the girls' house and the boy was hit on the head with a blunt object. He died at the scene.

Homicide Squad detectives yesterday arrested two men and a woman.

Joel Henderson, 39, of Wendouree and 35-year-old Darren Wilson of Ballarat have been charged with murder.

They will appear at Ballarat Magistrates Court tomorrow.

A 28-year-old Ballarat woman has been released while police continue their investigations.