Police say that around 5.45 am, an elderly woman in her 80s disturbed a male in her house at the Mary Street area of Lurgan.
The male assaulted the woman and made off from the house.
It is not believed that anything was taken.
The woman received medical treatment at the house for a non-life threatening injury.
She and another woman in her 70s, who also resides there, were left badly shaken by the incident.
The male was wearing a black hooded top.
Anyone with any information about this incident is asked to contact CID in Lurgan Police Station on 0845 600 8000.
Or if someone would prefer to provide information without giving their details, they can contact the independent charity Crimestoppers and speak to them anonymously on 0800 555 111.