[Maghrebia] A firefight in Nouakchott Friday night (July 17th) led to the arrests of two suspects in the fatal shooting of American NGO worker Christopher Leggett, ANI reported. One of the men had an explosive belt around his body that did not detonate, Mauritanian national security chief Mohamed Lemine Ould Ahmed said Saturday, adding that the incident occurred at a residence near the El Kast market, close to where Leggett was gunned down July 23rd.Two other members of the same alleged terror cell based in northern Mali were arrested on June 27th. Al-Qaeda in the Islamic Maghreb claimed responsibility for Leggett's murder.