Ten employees of Thomson Corp. working at New York's World Trade Center are unaccounted for, the Toronto-based information services company said yesterday.

Everything possible is being done to find out what happened to the missing employees, the company said.

In addition, it confirmed that one employee was killed on American Airlines Flight 11. The plane, flying from Boston to Los Angeles, was hijacked Tuesday morning and crashed into the trade center's north tower.

"We are in close contact with the family, and are doing everything in our power to help them through this ordeal," Dick Harrington, Thomson president and chief executive officer, said in a statement.

The company has determined that all other employees working in Manhattan are safe.

Thomson Financial, the company's financial services division, had three offices employing about 200 people in the trade center: Baseline, I/B/E/S and Vestek. In addition, Thomson had about 2,000 employees working in neighbouring buildings in Manhattan's financial district.

"We are grateful for the courage of Thomson people and their families as we begin to recover from the personal toll and shock of this tragedy," Mr. Harrington said. "We are committed to work closely with our people, customers and suppliers to begin healing and move forward."

A customer hot-line has been established to help with inquiries.

Thomson Financial business services are fully operational, and financial district staff have been relocated to other places in the New York metropolitan area.

The company's other divisions are operating as usual. Thomson said financial losses arising from Tuesday's tragedy will be fully covered.