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.

India's foreign secretary said it retaliated after Pakistan's "repeated violations" of the truce, while Pakistan said it "remains committed" to the ceasefire and that its forces were handling violations by India with "responsibility and restraint".

The ceasefire had been expected to bring a swift end to weeks of escalating clashes triggered by the mass shooting of tourists last month that India blames on Pakistan.