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".

India and Pakistan agreed to an immediate ceasefire on Saturday, unexpectedly halting the worst fighting in decades between the nuclear-armed neighbors, just when their tit-for-tat strikes appeared to be spiraling out of control.

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.