The Ministry of Defence was investigating today after a picture posted on Facebook appeared to show a soldier performing a Nazi-style salute.
A picture of Private Craig Orwin, 19, was posted on the social networking site showing a defiant Hitler-style Nazi salute, the Sun reported.
Pte Orwin serves with the Light Dragoons.
A spokeswoman for the Ministry of Defence said: "We are investigating an incident and if rules have been broken, appropriate disciplinary action will be taken.
"Members of the Armed Forces are free to join any political party but any racist behaviour or breach of the Army's values and standards will be dealt with robustly."
His unit is based in Swanton Morley, Norfolk. It has twice served in Iraq and also completed a six-month tour of Afghanistan.
Pte Orwin was unavailable for comment today.Reuse content