HOUSTON—Investigators say they're baffled by the fatal shootings last week of a family of four, including two children, at their suburban Houston home.

Harris County Sheriff Adrian Garcia said Tuesday that authorities are still trying to determine a motive for the slayings.

Deputies discovered the bodies Thursday in the family's Cypress home after co-workers of the husband became concerned when he didn't show for work for several days.

The names of the victims have not been released as authorities are still trying to contact relatives of the family, who immigrated from China.

Garcia says the search for a suspect continues.