The PSNI could be left "on its knees" if up to 1,000 officers are cut from its ranks by 2025, according to the Police Federation of Northern Ireland.
The PFNI represents officers in place of a union, which police forces are not allowed by law to have.
It comes after a letter to politicians from the Chief Constable Simon Byrne, in which he confirmed officer numbers may drop to about 6,000 in three years time.
