AKIPRESS.COM - A man suspected of killing six people, including four of his children, and wounding his 15-year-old daughter at a home in a Houston suburb surrendered to authorities late Wednesday after an hours-long standoff.

The Harris County Sherriff's Department said the shooting occurred shortly before 6 p.m. local time in the northern suburb of Spring. Authorities said the wounded teenager was able to call 911 and told the operator that her father planned to kill her grandparents at their home.

Deputies cornered the suspect in a cul-de-sac approximately three miles from the shooting site, where a standoff ensued before the man got out of his car, put up his hands, and dropped to his knees as he was placed under arrest.

Deputy Thomas Gilliland of the Harris County Sheriff's Office said that the victims were two boys, ages 4 and 14; two girls, ages 7 and 9, a 39-year-old man and a 33-year-old woman. The 15-year-old girl was described as being in "very critical condition" at Memorial Hermann Hospital in Houston late Wednesday night.

Gilliland said the children belonged to the gunman and his wife, adding that the pair are estranged and the wife lives out of state. Two of the children were adopted. It was not immediately clear what relationship the two adult victims had to the family, if any, the Associated Press reports.