The incidents happened in the Booterstown area.
Two men have been arrested following two robberies, two assaults and an attempted hijacking in Dublin last night.
In the first incident, a man was attacked when two men tried to take his car at around 9.30pm near Booterstown train station
His phone was taken, and the two attackers fled.
Later, and a short distance away, two men approached a pedestrian, attacked him and took items from him.
Two men aged in their 30's and 40's were later arrested, and the stolen property was recovered by Gardaí.