A deadly confrontation between Pakistani army troops and ethnic Pashtun protesters in a remote tribal region left at least three civilians dead.
Iran's foreign minister was in Pakistan on Friday, a critically timed visit amid a simmering crisis between Tehran and Washington.
India claims a MiG-21 pilot shot down a Pakistan F-16 fighter aircraft before his own aircraft was downed – but Pakistan's leadership denied this.
Although military officials have promised to respond forcefully to any new Indian aggression, they also hinted at a possible sea change in their traditional dominance over foreign and security policy.
The relationship between India and Pakistan is defined by distrust, mutual suspicion and enmity. Where do the two nuclear-armed countries go from here?
Nuclear conundrum: The potential for escalation is huge, and tensions will remain high as long as disputes between Pakistan and India go unresolved.
India and Pakistan: Scholars disagree about whether nuclear weapons stabilize or destabilize relations between adversaries.
Indian Prime Minister Narendra Modi broke his silence on the most dangerous clash between India and Pakistan in decades, saying he had begun a new era where India "will no longer be helpless in the face of terror" and casting his critics as foes of the nation.
Pakistan handed over a captured Indian air force pilot to Indian officials – a "gesture of peace" by Pakistani Prime Minister Imran Khan.
As hostilities escalate between India and Pakistan, the world is getting a taste of what a limited war between two nuclear-armed rivals might look like.