Twenty-two people have now been identified as suspects by two ongoing investigations into the Hillsborough disaster, including some who were not police officers.
Yesterday, the Independent Police Complaints Commission (IPCC) confirmed 13 retired or serving police officers were now being regarded as suspects as part of its inquiry into the aftermath of the 1989 tragedy in Sheffield.
Today, the IPCC said Operation Resolve - the wider criminal investigation into the disaster - has also identified 13 people "who fall within the suspect category".
It said six of these are retired police officers and seven worked for other, non-police organisations.
As the commission said four of those identified are being treated as suspects by both investigations, the total number of people being treated in this manner is now 22.
The Independent Police Complaints Commission says more than 250 accounts of the Hillsborough disaster are now suspected to have been amended.
Our ongoing analysis & investigative work has identified eight further police accounts which are suspected of being subject to amendments
The overall total of suspected amended accounts now stands at 251. We've also had over 1700 responses to the Hillsborough witness appeal
We have focussed on making phone contact with over 400 people who do not appear to have provided a previous account http://t.co/czOcWgl8kL
An allegation of surveillance by two police officers in the aftermath of Hillsborough is being investigated by the Independent Police Complaints Commission.
We've begun Hillsborough suspect interviews; 13 retired & serving officers are being IV'd under criminal caution. 4 jointly with Op Resolve
We're now investigating a previous surveillance allegation as part of the independent investigation into the aftermath of Hillsborough 1/2
It is alleged an individual was followed during the first Hillsborough inquests by 2 people who identified themselves as @wmpolice officers
Police officers involved in the Hillsborough disaster are being questioned as suspects for the first time.
Twelve retired police officers and one serving officer are being interviewed.
Elevenhave already been questioned under caution about a range of offences - including manslaughter, misconduct or perverting the course of justice.
In four days time, new inquests into the deaths are due to begin in Warrington. No one has ever been charged over the disaster.
ITV News Correspondent Damon Green reports:
Thirteen retired or serving police officers have been identified as "suspects" in the investigation into the Hillsborough disaster, the IPCC has said.
11 of these had already been interviewed under caution relating to the offences, which include manslaughter, misconduct in a public office, and perverting the course of justice.
A spokesman said the other two would be interviewed in the near future.
The police watchdog - The Independent Police Complaints Commission - say they have identified a total of 13 individuals - 12 former and one serving police officer - as suspects in their investigation into the Hillsborough disaster.
The suspected offences include manslaughter, perverting the course of justice, and misconduct in a public office. Four of those identified are also of interest to the criminal inquiry into the disaster, the IPCC said.
We've identified 12 retired police officers & 1 serving as suspects in our Hillsborough investigation. 4 are also of interest to Op Resolve
Hillsorough investigation: Suspected offences include perverting the course of justice, misconduct in a public office and manslaughter