RIO DE JANEIRO, June 6 (Reuters) - Some airlines are

delaying decisions to exercise aircraft purchase options amid

uncertainties related to the war in Iran, which has pushed up

jet fuel prices significantly, Embraer ( EMBJ ) CEO Francisco

Gomes Neto told Reuters on Saturday.

While the Brazilian planemaker has not seen requests to

defer deliveries or a slowdown in active sales campaigns, Gomes

Neto noted caution was emerging around incremental commitments.

"Some companies that could be exercising previously signed

options are leaving that a bit further ahead to better

understand how the situation will evolve," he said on the

sidelines of the International Air Transport Association's

(IATA) annual summit in Rio de Janeiro.