They are capable of it. It is up to the pilot.
But then again, why should anyone believe the locals just because they say they have no aircraft like that?
Furthermore, the US has repeatedly done the old "two strike" technique, so it fits the MO.
http://www.policymic.com/articles/21070/predator-drone-double-taps-highlight-possible-war-crimes-by-obama
Predator Drone 'Double-Taps' Highlight Possible War Crimes By Obama
NYU student Josh Begley has been tweeting every U.S. drone strike since President Bush's first bombing in Yemen back in 2002, and his Twitter feed highlights an incredibly disturbing tactic. The U.S. is employing a "double-tap" method in its use of drones, which means the bombing of a target multiple times in a very short period of time.
These "double-tap" attacks end up hitting "first responders" to the rubble and ashes that are left over after the initial strike, and Begley's tweets reveal that the U.S. has been intentionally targeting funerals and civilian rescuers.
While these tactics, when discussed at all (Obama's drone program is shrouded in an intense level of secrecy), are justified under the rubric of "national security," even the Department of Homeland Security and the FBI have classified "double-taps" as staples of terrorists, not the repertoire of supposed constitutional republics.
So while the "double-tap" method may please the likes of Hamas and the abortion clinic bomber Eric Rudolph, these attacks, even by the most broad definitions of international law, are blatant war crimes.