A mysterious package "containing a bomb threat" arrived during the day at Schlumberger's Rosharon Technology Centre in Brazoria County, the company said in a statement.
"All employees have been safely evacuated and local police and bomb squad personnel are onsite investigating," the company said, adding that it will release more information on the "developing situation" as it becomes available.
More than 800 R&D employees from 30 countries work at the Rosharon centre, according to its website.
