Two others were arrested later after the shooting.
The daring broad daylight robbery happened at Inter Arms shop at about 10 am.
Three Chinese nationals walked into the shop, pretending to be customers and asked the shop owner to have a look of some pistols and revolvers.
As the shop owner and one of his employees brought out the pistols and revolvers to show to them, they drew out guns in bid to rob.
A gun duel then broke out, and three robbers were injured along with the owner and his employee.
One was admitted to the Central Hospital and two others to Siriraj Piyamaharajkarun hospital.
Upon alerted if the attempted gunshop robbery, acting Metropolitan Police commissioner Pol Lt Gen Sanit Mahatavorn rushed to the scene to investigate.
A toy gun was also discovered inside a handbag of a robber.
Latest report said police arrested two other Chinese nationals suspected to belong to the same robbery gang.
Chinese robbers injured in gun duel with gun shop ownerhttp://goo.gl/ulpPJgThree Chinese robbers were shot and injured in a gun duel after they tried to rob a gunshop in Samyod area, the centre of gun selling in Bangkok, late this morning.
Posted by Thai PBS English News on 3 มีนาคม 2016