In a dramatic turn of events, US President Donald Trump took to social media on Saturday to announce that India and Pakistan - after four tense days of cross-border clashes - had agreed to a "full and immediate ceasefire".

The sudden announcement of a U.S.-brokered ceasefire followed four days of steady escalation between India and Pakistan and mixed signals from Washington.

Blasts were heard in Srinagar and Jammu and projectiles and flashes were seen in the night sky over Jammu, similar to the events of the previous evening, according to authorities, residents and Reuters witnesses.