Constable Kerr murder 'linked to other dissident incidents'
Detectives investigating the murder of Constable Ronan Kerr have said they have linked the killing to nine other dissident incidents.
Constable Kerr, 25, died when a bomb exploded under his car at Highfield Close in Omagh in April 2011.
Detectives are also trying to identify 11 vehicles and one man in the vicinity of Highfield Close in the days leading up to the murder and on the day itself.
Police have said they could be valuable witnesses or suspects.
They have put a map of the murder scene and the vehicles on the PSNI website.
Detective Superintendent Raymond Murray said the police investigation had Constable Kerr's murder at its core, but included several linked incidents.
These included an arms find, attempted murders, armed robberies and a number of other terrorist attacks.
"We are 10 months into this investigation but there is a long way to go," Det Supt Murray said.
"We have trawled through an enormous amount of information obtained from our enquiries and material gleaned from previous appeals.
"But there are still gaps which we are endeavouring to close in terms of building up a complete picture of the events leading up to the explosion.
"To date, there have been 56 searches, 10 arrests and one person charged as part of the overall investigation."
Anyone with information is asked to contact detectives on 028 8225 6687.