After a night of heavy shooting (including loud explosions caused by M79 grenade launchers) directly outside, and judging by the sounds that night also inside, Soi Ngam Duphli, one of the guards of a hotel very near to the entrance of the soi points out one of several bullet impacts. From other impacts, it is clear that the bullets came from a high building along Rama 4 which is under construction and is inside the army held area.
<a href="//commons.wikimedia.org/wiki/User:Takeaway" title="User:Takeaway">Takeaway</a>
CC BY-SA 3.0
<span class="int-own-work" lang="en">Own work</span>