Tulsa Police investigate the brutal beating of a man overnight. 

Emergency crews were called to a home at Pine and Kingston around 2:30 a.m. Wednesday.  A woman claims someone broke into her home and beat up her boyfriend. 

Police say the boyfriend has life-threatening head injuries.  The woman had a cut on the arm. 

Police officers say there were no signs of forced entry into the home, but a couple of doors were unlocked. 

At this time, Tulsa Police are still trying to piece together what happened.