Bill Etheridge, UKIP Defence spokesman, has condemned Labour in the wake of revelations that a Trident test resulted in a misdirected missile.
Labour and the Scottish National Party have been urging the government to give a full explanation to MPs on why test firing a Trident missile went wrong.
The unarmed missile headed towards Florida instead of its intended target weeks before MPs voted to renew the nuclear weapons system.
Nia Griffith, Labour's shadow defence secretary, has called on the Prime Minister, Theresa May, to give "a full explanation" to MPs later.
Mr Etheridge, UKIP MEP for the West Midlands, said “Whilst the failure of a missile test is a grave matter, is it one that should be discussed in the public arena?
“Surely it would be better for the experts in that field to be allowed to analyse and correct the fault without hindrance.
“Labour and indeed the Scottish Nationals are consistent in their desire to run down UK security, revealing details in the public domain.
“What next? Are they going to ask for a weekly debrief into the location of our nuclear submarines?”