DUBAI, United Arab Emirates — The Lebanese Army and its Syrian and Hezbollah allies separately declared a cease-fire with the Islamic State after a weeklong joint campaign against the militant group along the border with Syria in northern Lebanon, the Hezbollah-controlled television channel Al Manar said Sunday.

There were conflicting accounts, however, about the outcome of the border fighting. The Lebanese Army, which announced the cease-fire in a statement, said the truce had been intended to allow negotiations for the recovery of its missing soldiers. It did not claim to have defeated the Islamic State.

Hezbollah, however, said that fighters from the Islamic State, which is also known as ISIS or ISIL, had surrendered, had turned over the bodies of two Hezbollah combatants and had agreed to help determine what had happened to a number of missing Lebanese Army soldiers.

The Lebanese intelligence chief, Maj. Gen. Abbas Ibrahim, said Sunday that the authorities were awaiting DNA identification for six bodies recovered from the area.