ICTV Channel showed the video of the shooting.
The perpetrator empties his pockets (though not all contents are revealed). After that he tries to leave the room. The guards do not let him and he starts shooting. One of the guards tries to take away the gun but a bullet stops him.
After the shooting the perpetrator goes to the table to take his papers and possibly delete the surveilance video. He also changes the magaine in the gun.
The fifth guard who appeared in the doorway scared the shooter and he ran out into the shopping area and disappeared.