ATLANTA (AP) _ An effort to organize a union by Delta Air Lines ramp workers was denied Tuesday.

The National Mediation Board turned down a Transport Workers Union request for a representation election among the airline's ramp workers, who handle baggage and perform other airport tasks.

The mediation board said it found ``no basis'' for an election because the union failed to produce evidence that at least 35 percent of the workers at Atlanta-based Delta wanted a vote to be held.

``It's a big disappointment for the employees who only wanted some job security and a contract,'' said TWU organizer Steve Roberts.

Delta Chief Executive Leo F. Mullin called the ruling ``good news for Delta employees and our company.''

``This outcome supports the growing sense of partnership under the current company structure that will result in a superior competitive position in the marketplace,'' Mullin said in a memo.