Israeli Prime Minister Benjamin Netanyahu has not ruled out further strikes on Hamas leaders following last week's attack in Qatar, saying they would not have immunity wherever they are.
Speaking at a Jerusalem press conference with US Secretary of State Marco Rubio, Netanyahu said every country had the right to defend itself beyond its borders.
Israel's decision to target Hamas leaders in Qatar - a close US ally - drew international outrage and criticism from US President Donald Trump. Hamas said six people were killed but that its leaders survived.
Netanyahu's comments come days after the White House said Trump had assured Qatar that such a thing will not happen again on their soil.
When pressed on whether the US had any involvement in the strike, Netanyahu told journalists: We did it on our own. Period.
In response to a BBC question about whether the strike had damaged US relations in the region, Rubio said Washington maintained strong relationships with our Gulf allies.
The pair presented a broadly united front, even amid the apparent tensions, with Rubio praising the two countries' technological and cultural ties - and Netanyahu saying Israel had no better ally.
Their meeting comes as Arab leaders hold a summit in a show of support for Qatar. The Qatari prime minister urged the international community to stop applying double standards and to punish Israel.
Qatar hosts a major US airbase and has played a key role in brokering diplomatic efforts to end the war in Gaza, serving as a mediator of indirect negotiations between Hamas and Israel. It has hosted the Hamas political bureau since 2012.
According to a State Department official, Rubio will travel on to Qatar following his Israel trip.
On Sunday, Netanyahu told reporters that the US-Israel relationship was as durable as the stones in the Western Wall while he and Rubio made a short visit to the holy site in Jerusalem's Old City.
During the trip - on which they were accompanied by US ambassador to Israel Mike Huckabee - Rubio wrote a note and placed it into the wall, a traditional ritual performed by visitors. The men ignored reporters' questions focusing on Israel's strikes in Qatar.
Also thought to have been discussed by Netanyahu and Rubio are Israeli military plans to seize Gaza City and Israel's continued expansion of settlements in the occupied West Bank.
Throughout the weekend, the Israeli military pressed ahead with the demolition of buildings in Gaza City, and it is now poised to begin ground operations in the western neighborhoods of the city.
The Israel Defense Forces (IDF) estimate about 250,000 Palestinians have fled, though hundreds of thousands are believed to remain in the area.
Some say they cannot afford to evacuate, while others say southern Gaza is not safe due to previous Israeli airstrikes.
The UN has warned an intensification of the offensive on an area where a famine has already been declared will push civilians into an even deeper catastrophe.
Netanyahu and Rubio's meeting comes ahead of a UN General Assembly session next week, at which some leading US allies are expected to recognize the State of Palestine.
This expected recognition has intensified debate within Israel around the future of the West Bank, with hardline elements of the government insisting annexation is the only way to prevent a Palestinian state.
In late August, the Israeli government gave final approval for the E1 settlement project, which would effectively split the West Bank in two.
Signing an agreement for the project, Netanyahu stated: We are going to fulfill our promise that there will be no Palestinian state. This place belongs to us.
Earlier this month, Israel's far-right Finance Minister proposed annexation of a large portion of the West Bank.
