Reports of explosions have been coming from several places along the Line of Control, the de facto border between India and Pakistan in Kashmir, since the early hours of Saturday.
BBC reporters have heard explosions in Indian-administered Kashmir’s Srinagar and Jammu cities. The source of these explosions has not been identified.
Local media has also reported hearing the sound of explosions from Udhampur in Indian-administered Kashmir and Pathankot in Punjab – both places have Indian defence installations that Pakistan claims to have targeted.
Earlier, Pakistan claimed India had fired missiles at airbases in Rawalpindi – 10km (6.2m) from Pakistan’s capital Islamabad – Chakwal and Shorkot. India is yet to comment on these claims.