I believe it is termed steganography.
Three men have reportedly been arrested and two police officers injured after a shoot out in the the Paris suburb of St Denis on Wednesday morning local time.
Heavy shooting, automatic gun fire and explosions were reported in St-Denis as police exchanged gunfire with a group of suspects who barricaded themselves in an apartment
Local MP Mathieu Hanotin has warned locals to stay at home, saying “It’s not over”, The London Telegraph reports.
Two to three men had barricaded themselves in an apartment in the centre of the Paris suburb of Saint Denis, according to journalist Djamel Mazi who is on the scene.
http://www.smh.com.au/world/paris-attacks-reports-of-gunfire-in-paris-suburb-20151118-gl217i.html#ixzz3roqvSa46
Follow us: @smh on Twitter | sydneymorningherald on Facebook