At least five Pakistan Taliban fighters have been killed in a bombing in the South Waziristan tribal area near the Afghan border, local officials say.
A commander of the Sajna group was among those reported killed when his vehicle hit a roadside bomb, believed to have been planted by rivals.
More than 40 militants have been killed in infighting that broke out in the Pakistan Taliban in early April.
It is the first such incident since a recent ceasefire between factions.
The blast occurred on Tuesday night in the Shaktoi area of South Waziristan.
“A local commander of the Sajna group and his four associates have been killed, they died on the spot,” a local intelligence official told AFP news agency.
The feud is part of a split in the Pakistan Taliban, which worsened after its leader Hakimullah Mehsud was killed in a US drone strike late last year, the BBC’s M Ilyas Khan in Islamabad reports.