CIA drones are reportedly reviving the use of highly-controversial tactics that target rescuers and funeral-goers.

On Monday US drones attacked rescuers in Waziristan in western Pakistan minutes after an initial strike, killing 16 people in total according to the BBC. On May 28, drones were also reported to have returned to the attack in Khassokhel near Mir Ali.

And on Sunday, a CIA drone strike targeted people gathered for funeral prayers of militant victims killed in an earlier attack. The intended Taliban targets appear to have survived, although up to ten people died. A mosque was also struck last week – possibly accidentally – killing at least three civilian worshippers.

The tactics may not be confined to Pakistan. In the Yemeni city of Jaar on May 15, a possible return US drone strike killed between 8 and 26 civilians, according to a USA Today report.

The deliberate targeting of rescuers and mourners by CIA drones was first exposed by the Bureau in February 2012, in a major joint investigation with the Sunday Times. On more than a dozen occasions between 2009 and June 2011, the CIA attacked rescuers as they tried to retrieve the dead and injured. Although Taliban members were killed on almost every occasion, so too were civilians – many of whom the Bureau’s field investigators were able to name. The investigation also reported that on at least three occasions the CIA had struck funeral-goers.