Pakistan’s Prime Minister Imran Khan is calling on world leaders to crack down on online hate and extremism following the deadly truck attack in London, Ont. — now being investigated by authorities as a possible act of terror.

Four people were killed and a nine-year-old boy suffered serious injuries when they were run down by a pickup truck Sunday evening.

Police say the family was targeted because they were Muslim. The family moved to Canada from Pakistan in 2007.

“Everyone is shocked in [Pakistan], because we saw the family picture, and so a family being targeted like that has had a