The planes each had two crew members on board aged 31 to 36, and one of the pilots is Mariangela Valentini, a woman who served with NATO forces in Afghanistan and Libya.
The country's airforce said the death toll of yesterday's crash in wooded countryside near Ascoli Piceno in the Marche region had "risen to two," adding that the identity of the pilots had not yet been established.
The fighter jets were based at Brescia in northern Italy and had been taking part in training exercises ahead of a larger NATO operation scheduled for later in the year.
An investigation is underway into the cause of the accident.