Pakistan has warned it will "not de-escalate" a spiralling conflict with India, and blamed New Delhi for bringing the two nuclear-armed neighbours closer to a full-blown war, with the death toll from days of violence crossing 50.

Shehbaz Sharif says Pakistan responded to India's air strikes by downing Indian jets, a claim Delhi has not confirmed.

Pakistan says it will avenge those killed by India’s missile strikes that New Delhi called retaliation for last month’s massacre of Indian tourists.