Imran Khan said he is "shocked and deeply saddened" by the killing of Pakistani politician Zahra Shahid Hussain:
I am shocked & deeply saddened by the brutal killing of Zara Shahid Hussain, Zara apa to us, in Karachi tonite. A targetted act of terror!
Police said Ms Hussain was shot dead outside her home in Karachi, Pakistan's Dawn newspaper reported.
She was the senior vice-president of Khan's Movement for Justice party.