The Ministry of Defence (Mindef) has clarified that the man who was filmed shouting in a library and claiming to be "Singapore Armed Forces commando special operations force counter terrorist plainclothes" is not a member of the SAF.

A post on The Singapore Army Facebook page said: "We have identified the person in question; and wish to clarify that he is not a member of the SAF nor has he served in the Commandos. He currently has no NS liability."

In the video which has been posted on social media and online forums, the man, who claims to be 40 years old, is seen yelling vulgarities at another library user and challenging him to a fight. A staff member of the library is seen repeatedly asking the agitated man to lower his voice and leave the premises.

It is not known when the incident happened but it is understood the video was filmed at Yishun Public Library at Northpoint Shopping Centre.