The Biden administration announced plans to slap new tariffs on Chinese electric vehicles, advanced batteries, solar cells, steel, aluminum and medical equipment — an election-year move that's likely to increase friction between the world's two largest economies.

The tariffs come in the middle of a heated campaign between President Joe Biden and his Republican predecessor, Donald Trump, in which both candidates are vying to show who's tougher on China.

U.S. Secretary of State Antony Blinken arrived in Kyiv on Tuesday in an unannounced diplomatic mission to reassure Ukraine that it has American support as it struggles to defend against increasingly intense Russian attacks.

The visit comes less than a month after Congress approved a long-delayed foreign assistance package that sets aside $60 billion in aid for Ukraine, much of which will go toward replenishing badly depleted artillery and air defense systems.

Human Rights Watch says Israeli forces have carried out at least eight strikes on aid workers and their convoys, killing at least 15 people, including two children, since the start of the war in Gaza.

The New York-based rights group said in a report Tuesday that in each case the aid groups had provided their coordinates to Israeli authorities to ensure their safety. It says no advance warning was given before the strikes, which also wounded at least 16 people.

Nearly half a million Palestinians have been displaced in recent days by escalating Israeli military operations in southern and northern Gaza, the United Nations says.

Palestinian officials say Israeli strikes in central Gaza killed at least 12 people overnight and into Tuesday.

The United States called on Iran on Monday to halt its transfer of an "unprecedented" amount of weaponry to Yemen's Houthi rebels, enabling their fighters to carry out "reckless attacks" on ships in the Red Sea and elsewhere.

U.S. deputy ambassador Robert Wood told the U.N. Security Council that if it wants to make progress toward ending the civil war in Yemen, it should collectively "call Iran out for its destabilizing role and insist that it cannot hide behind the Houthis."

Palestinians on Wednesday will mark the 76th year of their mass expulsion from what is now Israel, an event that is at the core of their national struggle. But in many ways, that experience pales in comparison to the calamity now unfolding in Gaza.

Palestinians refer to it as the "Nakba," Arabic for "catastrophe." Some 700,000 Palestinians — a majority of the prewar population — fled or were driven from their homes before and during the 1948 Arab-Israeli war that followed Israel's establishment.

Turkish President Recep Tayyip Erdogan on Monday confirmed the reopening for Muslim worship of a mosque in Istanbul converted from an ancient Byzantine Orthodox church.

"The Kariye mosque in its new form will remain open to everyone," he said, addressing a press conference with Greek Prime Minister Kyriakos Mitsotakis, who had appealed against the conversion of the Holy Saviour in Chora, decorated with 14th-century frescoes of the Last Judgement that are still treasured by Christians.

Turkey's President Recep Tayyip Erdogan said Monday that "more than 1,000 members" of the Palestinian militant group Hamas were being treated in Turkish hospitals amid the ongoing war in Gaza.

Erdogan, a vocal critic of Israel's war in the Palestinian territory since Hamas' attacks on October 7, made the announcement to reporters, adding that he considered Hamas "a resistance organisation".

Aid workers are struggling to distribute dwindling food and other supplies to hundreds of thousands of Palestinians displaced by what Israel says is a limited operation in Rafah, as the two main crossings near the southern Gaza city remain closed.

The United Nations' agency for Palestinian refugees said 360,000 Palestinians have fled Rafah over the past week, out of 1.3 million who were sheltering there before the operation began, most of whom had already fled fighting elsewhere over the course of the 7-month war between Israel and Hamas.

Greece's leader arrived in Turkey's capital on Monday for talks with President Recep Tayyip Erdogan as both countries pursue a normalization program and seek to put aside decades-old disputes.

Greek Prime Minister Kyriakos Mitsotakis was welcomed by Erdogan and a military guard of honor at the presidential palace in Ankara before the leaders' fourth meeting over the past year. They are expected to hold two hours of discussions followed by a news conference.