Hundred of pagers detonated on Tuesday in Lebanon in an apparent attack on Hezbollah.AFP via Getty ImagesHundreds of pagers throughout Lebanon were detonated on Tuesday.An attack of this scale likely required months of planning, an arms expert told BI.The attack also shows a lack of oversight of global supply chains, experts said.The Tuesday attack in Lebanon, where hundreds of pagers used by the Iran-backed militant group Hezbollah simultaneously detonated, points to a highly sophisticated operation that likely required months of planning and an infiltration of a global supply chain, experts told Business Insider.At least 2,800 people were injured and 12 killed, The Associated Press reported, citing the Lebanese Health Ministry.