Good Samaritan's throat slashed by bottle

A good Samaritan who stepped between a feuding couple in the NSW Riverina region has been rewarded with a broken beer bottle to the throat.

The 28-year-old man tried to calm a yelling match between a man and woman on a Wagga Wagga street in the early hours of Saturday morning.

It's alleged the feuding man, 37, then smashed a beer bottle on the victim's face, slashing his throat.

The alleged attacker tried to flee but was detained by witnesses until police arrived to make an arrest.

He will appear at Wagga Wagga Local Court on Sunday on a charge of malicious wounding causing grievous bodily harm.

The victim was taken to hospital in a serious but stable condition.