Mexico’s president on Friday urged the United States to shed light on a gun-running sting that caused bilateral friction under the Obama presidency, questioning the behaviour of past US administrations for the third time this week.

Mexican President Andres Manuel Lopez Obrador said his government would send a diplomatic note to Washington for information on the 2009-2011 operation known as ‘Fast and Furious,’ a topic that has resurfaced in recent days amid a debate over historic US-Mexico cooperation on security and possible corruption under previous administrations.