Source:
BBCThe victims - four women and three men - were discovered in the city of Grapevine, just outside Dallas.
Local police said they believed one person shot the other six before committing suicide, NBC 5 reports. <snip>
"It appears to be they're all related. It appears all the victims are deceased from gunshot wounds," Grapevine police Sgt Robert Eberling was quoted as saying by the Associated Press news agency.
"We are pretty confident that the shooter is among the deceased victims inside the apartment. We are not actively looking for a shooter that we believe is at large," the police officer added.
Read more:
http://www.bbc.co.uk/news/world-us-canada-16330307
The article states that the bodies were all found near a Christmas tree; gifts had been opened.