PSNI officers left tributes to four of their colleagues killed in the line of duty on the 10th anniversary of their deaths.
Kenny Irvine, Declan Greene, Kevin Gorman and James Magee were responding to a 999 call when they were killed in a road accident near Rostrevor on November 23, 2008.
They were all in their 20s and 30s and were based at Kilkeel PSNI station.
Yesterday Newry and Mourne PSNI said on its Facebook page that officers from B section visited the scene to "remember our friends and colleagues" and to lay flowers at the spot.
"These four men died not hesitating to answer the call for assistance from colleagues and paid the ultimate price." The post added the men would "never be forgotten".
An inquest in 2014 heard that frantic attempts had been made by police officers and bystanders to free the men from their vehicle.