Pakistani soldiers crossed the cease-fire line in the disputed Himalayan region of Kashmir on Tuesday and attacked an army patrol, killing two Indian soldiers before retreating back into Pakistani-controlled territory, an Indian army official said.

The outbreak of violence was the second in three days in Kashmir, where a cease-fire has largely held for a decade between the two wary, nuclear-armed rivals. Deaths in military exchanges are now extremely rare. But while diplomatic nervousness over the disputed region is never far from the surface, the earlier incident created no signs of escalating tensions.