Six killed after father opens fire in Texas Updated: Thursday, July 10, 2014 | HOUSTON, Texas (NEWSCHANNEL 3) - Six people are dead, including four children, after their father opened fire inside a home in suburban Houston Wednesday night.Investigators say the man also shot two adults and badly injured his 15-year-old daughter.She was still able to call police, telling them that her father planned to leave the home and go to her grandparents' home to kill them, too.A couple of SWAT team vehicles eventually corned the man and a 3-hour stand-off began.Police say after several hours of tense negotiations, he surrendered.They say the gunman was apparently going through a divorce and that his estranged wife was out of state."I don't know what people go through when they go through a divorce. I imagine the rage is great, that's the unfortunate thing," said neighbor Manar Saah."I'm so worried about the families about what he did to them because it's so sad," said a neighbor.The children who were killed were boys, ages 4 and 14, and 7 and 9 year old girls. Two of them were adopted.The teen who warned police about her father is in critical condition Thursday morning.