Hundreds of demonstrators have held protests in London, after gunmen shot and killed a senior member of a leading Pakistani political party outside her home in the city of Karachi in southern Sindh province.
The Pakistan Tehreek-e-Insaf PTI's leader, former international cricket star Imran Khan, immediately blamed the killing of Zara Shahid Hussain on the Muttahida Quami Movement.
Mr Khan, who leads the Pakistan Tehreek-e-Insaf party, has blamed the death on the Muttahida Quami Movement's leader Altaf Hussain, who lives in the UK.
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Rescue workers are at the site Sunday morning trying to cut open mangled coaches.
Despite chilly temperatures it will be a mostly dry day, and milder than yesterday.