Initial investigation conducted by both the Philippine National Police and the Hongkong Police show that eight of the victims bore mortal wounds at the back. What does this prove? It seems that the victims were probably KILLED by the SWAT team which assaulted the tourist bus at the back.
If you look at the video, the hostage-taker was actually at the front side of the bus, waiting for the assault of the SWAT team at the back. Most of the hostage victims were facing him, meaning their backs are against the bus seats. He was shot by a sniper when he went near the driver's seat. The SWAT team meanwhile, entered the bus through the back.
This is a very, very unfortunate incident. If this is correct, then, the SWAT team was actually the one who shot, and killed those hostage victims, mostly Hongkong tourists.
Hongkong police should conduct a parallel and thorough investigation about this.