The Dallas Police department has seen a spike in applications following the July 7 mass shooting that resulted in the deaths of five officers.

The department reports that it received 467 applications during the 12 days following the shooting, representing a 344 percent increase from the 136 reported during a similar period in June.

The alleged shooter during the July 7 attack on the officers at a Black Lives Matter protest was a man who had been upset by the recent shootings of Philando Castile in Falcon Heights, Minn., and Alton Sterling in Baton Rouge, La. Following the shooting, Dallas Police Chief David Brown called on protestors to join the force to improve it from the inside, as CNN reported.