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.
More top news
The US president raised laughs as he read out a series of insults about himself - but it ended with a tweet from Trump himself.
Experts have warned pregnant woman to avoid non-essential travel there.
A colder start to the day with outbreaks of rain expected across Wales and southern England.