Singh.

"You can make the difference between Mark Carney getting a super majority or sending enough New Democrats to Ottawa so we can fight to defend the things you care about," leader Jagmeet Singh said earlier this week.

More significantly, Defence Minister Rajnath Singh has vowed a "strong response," pledging action not just against the perpetrators but also the masterminds behind the "nefarious acts" on Indian soil.

Earlier, Defence Minister Rajnath Singh also signalled India's response would go beyond targeting the perpetrators.

Vinay's grandfather, Hawa Singh Narwal, told BBC Punjabi that his grandson had initially wanted to go to Switzerland for his honeymoon.

"Those responsible and behind such an act will very soon hear our response, loud and clear," Defence Minister Rajnath Singh said.