LOS ANGELES, California (CNN) -- A gunman opened fire Thursday at Los Angeles International Airport while standing in line at the ticket counter of Israel's El Al Airlines, officials said, killing two and wounding four others before an airline security officer shot him dead. Authorities identified the gunman as 41-year-old Hesham Mohamed Hadayet, who came to the United States from Egypt in 1992 and had been living in Irvine, California, for the last two years. Hadayet was not a U.S. citizen