Police Lance Corporal Thanapol Nopluay, 25, was shot at his right shoulder by live bullet during the clash. He is now undergoing surgery.
Police Senior Sergeant Major Preecha Thongpiam, 42, is hospitalised for injuries from tear gas and unknown objects that hit his head and the right arm.
Police Sergeant Major Tawee Wongchan, 40, is hospitalised for injuries from tear gas and unknown objects that hit his right leg.
At noon, Piya told TNN news station that two more officers, injured by ping pong bombs are still inside the centre.
Saying that the poll numbers draw is completed, he asked protesters why they are still trying to break into the centre where the draw took place in the morning.