An attack on tourists in India's Himalayan territory of Kashmir this week sparked a new crisis between nuclear armed South Asian neighbours India and Pakistan, with New Delhi blaming militants with "cross-border linkages" for the killings.

There was a face-off between Indian diaspora groups who gathered to protest Pakistan-backed terrorism in the wake of the Pahalgam terrorist attack and counter-protesters outside the Pakistan High Commission in London, which saw scenes of a Pakistani diplomatic official making threatening gestures.

Officials said 24 of the people killed were Indian tourists, one was from Nepal and one was a local tourist guide. At least 17 others were injured.