Thai soldier Jakraphanth Thomma who killed 26 people in a gun rampage in the Thai city of Nakhon Ratchasima has been shot dead by the security forces, Thai police say.

Reportedly, the gunman, who posted material to social media, was shot dead after being cornered all night in the building.

He had earlier posted an image of a pistol with three sets of bullets, along with the words "it is time to get excited" and "nobody can avoid death".

Facebook has now taken the page down.

Jakraphanth Thomma on Saturday killed his commanding officer stealing weapons from a military camp before killing 26 people and wounding other 57 in in the shopping centre.