US Secretary of State Antony Blinken said the ceasefire in Lebanon was "holding" despite a series of incidents between Israel and Iran-backed militants Hezbollah.
"The ceasefire is holding, and we're using the mechanism that was established when any concerns have arisen about any alleged or purported violations," Mr Blinken told journalists on the sidelines of a NATO meeting in Brussels.
Both Israel and Hezbollah face accusations of having breached the truce that took effect last Wednesday to end a war that has killed thousands in Lebanon and sparked mass displacements on both sides.
"I think fundamentally, both parties, that is to say Israel and Hezbollah, through the Lebanese government, wanted and continue to want the cease fire," said Mr Blinken.
"But we have to make sure that it's upheld. And we're determined to do that," he added.
A committee including France, UN peacekeepers, Israel, Lebanon and chaired by the United States is tasked with maintaining communication between the various parties and ensuring violations are identified and dealt with to avoid any escalation.
"The mechanism that we established with France to make sure that the ceasefire is effectively monitored and implemented is working, and we want to make sure it continues to work," Mr Blinken said.
"If there are concerns that one party or the other is violating the ceasefire, it comes to us, and one way or another, we engage the parties. That's exactly what's happened," he added.
Israel stepped up its campaign in south Lebanon in late September after nearly a year of cross-border exchanges by Hezbollah in support of its ally Hamas, following the Palestinian group's 7 October, 2023 attack on southern Israel.
The death toll in Lebanon in more than a year of war between Israel and Hezbollah has reached 4,047 people, most of them since a September escalation, authorities have said.
A week after a ceasefire took effect, Lebanese Health Minister Firass Abiad told reporters that "until now...we have recorded 4,047 dead and 16,638 wounded".
Most of the deaths occurred after 15 September, he said, adding that "we believe the real number may be higher" due to unrecorded deaths.
Mr Abiad said 316 children and 790 women were among the dead.
A source close to Hezbollah had told AFP that hundreds of the group's fighters had been killed, without providing a precise figure.
Israel stepped up its campaign in south Lebanon in late September after nearly a year of cross-border exchanges begun by Hezbollah in support of its ally Hamas.
On Monday, Israeli strikes on south Lebanon killed 11 people, according to the health ministry, after Hezbollah earlier in the day claimed its first attack on an Israeli position since the truce began.
Yesterday, Israeli Defence Minister Israel Katz warned that "if we return to war, we will act with greater force and penetrate deeper" into Lebanon, adding that "there will be no immunity" for the Lebanese state, which was not a party to the Israel-Hezbollah war.
