Gardaí examine possibility of Real IRA retaliation to Vincent Ryan murder

The call from the 32 County Sovereignty Movement comes as senior gardaí try to assess the likelihood of retaliation by the Real IRA.
Detectives suspect the 25-year-old victim was murdered on the orders of the same crime bosses who shot dead his brother, Alan Ryan, the then Dublin leader of the Real IRA, in September 2012.