Relations between India and Pakistan are cratering following a deadly militant attack in Indian-administered Kashmir that has sparked tit-for-tat reprisals and raised fears of another military escalation between the nuclear-armed rivals.

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.

Scores of South Africans, along with members of the Indian expatriate community, have gathered to express their solidarity with India and pay tribute to the victims of the Pahalgam terrorist attack at a memorial service organised by the Consulate General of India here.