text: A lady was knocked over during the theft in Market Street, Limavady, which happened at about 15:00 BST on Friday. She suffered non life-threatening injuries.
  Police have said the officers were nearby when the incident occurred and a 20-year-old man was detained.
  Supt John Magill commended the off-duty officers.
  "I feel that this is a perfect example of police officers continuing to keep people safe, whether they are on or off duty at the time."
target: Two off-duty police officers have arrested a man after a burglary at a shop in County Londonderry.