Four people died in a multiple vehicle collision last night near Ballinasloe in County Galway.
While two men were killed earlier in the day following a crash at Duleek in Meath.
Brian Farrell from the Road Safety Authority is urging drivers to slow down:
"Both the RSA and the Gardaí are issuing a joint appeal, urging people to take greater care when using the roads. It really has been a dark 24 hour on our roads. I suppose, if anything is to come from such loss of life, we want people to realise that using the roads is the most dangerous thing that we do every day, and we really do have to take care."