NEW : Police identify suspect as 47-year-old Chuang Li . ` ` This is a very difficult time , '' the company says . `` Out of respect for the privacy of the individual and their family , we are not able to share or comment on the specifics of the individual 's condition , but all four employees are being treated by medical experts at area hospitals , '' a Ceridian statement said . The attack happened on the office building 's fifth floor . It was not immediately clear if there were any other people in the building.
NEW : Police identify suspect as 47-year-old Chuang Li . ` ` This is a very difficult time , '' the company says . The attack happened on the office building 's fifth floor . It was not immediately clear if there were any other people in the building.