The elders of a Baloch tribe were members of a 'jirga' or council that was trying to impose tribal laws in Rajanpur district of Punjab.
The elders ordered the two men - Hasan Mohammad and Ameer Bukhsh Leghari - to undergo the "trial by fire" ritual on Sunday after they were accused of murder and adultery, respectively.
Both men were declared innocent after their feet were inspected by the tribal elders. Their feet reportedly remained unharmed even after they crossed a 24-foot strip of burning coals.
Policemen reached the spot and arrested six elders who were identified as Mureed Bukhsh, Maoj Ali, Maulvi Ibrahim, Jan Mohammad, Bhutto Nokani and Baz Ali. They also booked another 14 tribesmen under sections of the Pakistan Penal Code.
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"We have booked 20 and arrested six for holding the trial," BMP Commandant Saifullah Khan told reporters.
Those arrested face charges of attempted murder and causing harm with fire.
Tahseen Raza, a local journalist, told PTI that the tradition of holding "trial by fire" rituals was centuries old and nobody opposed it.