Gardaí investigating the murder of Detective Garda Adrian Donohoe in Co Louth last week have renewed their appeal for information.
Leaflets were handed out to people attending a horse racing event at Dundalk Stadium this evening.
A checkpoint was also set up near Lordship, Bellurgan close to where the killing took place last Friday night.
They would like to talk to anyone who noticed any suspicious activity in the vicinity of Lordship Credit Union last Friday night or in the days before the murder.
One line of inquiry is the discovery of a burnt-out car last Sunday on the Keady to Newtownhamilton Road in Co Armagh.
It has been established the navy Volkswagen Passat (08 D) was stolen during the course of a burglary at Clogherhead, Co Louth between 11.30pm and 4.30am on 22/23 January.
Gardaí say on the night this car was stolen there was a large funeral in Clogherhead and this may jog some local people's memories of the night.
Anyone who may have noticed this car in the day or hours leading up to the murder or who may seen this car in the Bellurgan or Keady areas is asked to contact the incident room at Dundalk Garda Station on 042 9388400.
People can also contact the Garda Confidential Line 1800-666111, any garda station or the PSNI on 04890-650222 (from Republic of Ireland) or 0845-6008000 (from Northern Ireland).