Two separate groups handed in more than 100,000 signatures to the Federal Chancellery on Tuesday, twice as many as necessary to challenge a parliamentary decision.
The purchase of the jets is too costly and unnecessary according to a committee of centre-left politicians. It said the existing fleet of FA/18 aircraft was sufficient to defend Switzerland’s airspace.
A separate group of centrist politicians for its part, added that it was not the right time to buy new aircraft for CHF3.1 billion ($3.4 billion) from the Swedish Saab company.
However, the centre-right Radical Party said the opponents were undermining Switzerland’s air force and national security.
No date for the vote has been set.
Last September, parliament approved the purchase following five years of heated discussions.