The report on collaborative reforms aimed at reducing police shootings was commissioned by Police Commissioner Charles Ramsey.
Federal officials started looking into the department's use of force in 2013 after Philadelphia saw more than a 120 police-involved shootings in two years.
Patty Hartman, spokeswoman for the U.S. Attorney's Office in Philadelphia, said the release of the report will be rescheduled. Mayor Michael Nutter was scheduled to speak at a public event on the report at the U.S. Attorney's Office, but that event was also cancelled.