Reuters reports today that a planned coup was nipped in the bud before it could be carried out. An aide close to Abu Bakr al-Baghdadi was apparently among those who planned the action, in which weapons had been hidden in numerous locations around Mosul. Once outside forces invaded, these plotters apparently would have joined them. Daesh reportedly executed 58 people suspected of being part of this and buried them in a mass grave outside the city.
What struck me is that this sounds strikingly like the way that ISIS would target cities in Syria for being taken over. They would send someone, months in advance, who would rent apartments and covertly fill them with weapons and supplies. Once the attack on the city started, ISIS fighters knew exactly where to find stores of weapons to bolster their fight. (see “How ISI Came to Syria” in ISIS: Inside the Army of Terror by Hassan Hassan and Michael Weiss, p 149-150 and “Secret Files Reveal the Structure of the Islamic State” by Christoph Reuter, Der Spiegel 4/18/2015)
Whether that is the model being used here or not, it comes not that long after news came out that an underground opposition movement existed in Mosul. Named Kitaeb Mosul, the group would spraypaint an “M” for muqawwama, meaning “resistance” on walls in the city.