The truce came after several days of the countries’ most expansive fighting in decades. One Indian official said the country would “deal strongly” with any violations.

The neighboring countries exchanged fire for several days after India's missile attack on Pakistan before reaching a ceasefire on Saturday.

The ceasefire follows weeks of clashes that were triggered by a gun massacre on tourists last month that India blames on Pakistan. The first word on the truce came from U.S.