Two people have now been arrested over an aggravated robbery and serious assault in central Palmerston North 10 days ago.

A 19-year-old man turned himself to police in yesterday afternoon, now a 38-year-old woman has been arrested.

The man and woman have both been charged with attempting to cause grievous bodily harm, and the woman also faces a charge of aggravated robbery

They're both appearing in the Palmerston North District Court today.