4 officers dead, 2 in surgery and 3 in critical condition in the wake of the Dallas protest

Initial report was 3 officers dead, 2 in surgery and 3 in critical condition in the wake of Dallas protest. Dallas Police officers say they think 2 snipers shot at 11 police officers from elevated position(s). The officers were shot during a Dallas peaceful protest in the wake of the 2 black men who were shot by Police officers in Baton Rouge, Louisiana and Minnesota. The officers were there to protect the protesters. No protester was said to be injured.
Now a 4th officer has been confirmed dead. More photos after the cut..
Update: Total of 4 officers have been killed. 3 Dallas officers and 1 DARP officer.