Brother of murdered Pakistani whistleblower vows to take up fight

The brother of a whistleblower murdered over a notorious "honour killing" case vowed Wednesday to take up the cause, even as he feared becoming the latest to pay for it with his life.

Bin Yasir's brother Afzal Kohistani was gunned down last month, igniting fresh outrage over a years-long case in which video of wedding guests enjoying themselves led to bloodshed.

Yasir said three other brothers had also been murdered as a result of the case.

"Our entire family lives in fear," Yasir told a press conference in the northwestern city of Peshawar at which he demanded a new investigation into the case.

"Afzal had the same fear and later he was killed. I, too, fear death. One day, they will kill me too -- but we will not backtrack from this issue."