India and Pakistan have agreed a "full and immediate ceasefire" according to the US President.
Pakistan had launched a military operation against India last night - with what it called "retaliatory strikes", that's understood to have killed 13 people.
Posting on Truth Social, Donald Trump says the deal comes after a "long night of talks" mediated by the US.
Mr Trump went on to congratulate both countries "on using common sense and great intelligence".
Secretary of State Marco Rubio had been holding regular calls with the Indian foreign minister and Pakistan's Prime Minister since April.

€1.5 Million Cannabis Seized in Joint Dublin Operation
Calls For Prison Security Review After Inmate Died In Their Cell
Fuel Oil Prices At Highest Recorded Value In Five Years
Over 200 Fines For E-Scooter Offences Issued In Kildare Carlow Area
Planned 72-Hour Ambulance Strike Called Off
Taoiseach Travelling To Vatican To Meet Pope Leo
Newbridge Scientist Hopeful For Ambitious Project Aimed At Preventing Hospital-Acquired Infections
Irish Rail To Scrap IT System Believed To Be Worth €50 Million