A Russian drone struck an apartment building in NATO-member Romania early Friday, wounding two people in the latest spillover from the war in Ukraine and prompting strong condemnation from the Atlantic alliance and the European Union.

U.S. and Iranian negotiators have reached an agreement on a 60-day memorandum of understanding to extend the ceasefire and launch negotiations on Iran's nuclear program, but U.S. President Donald Trump has yet to give it his final approval, two U.S. officials and a regional source involved in the mediation efforts told U.S. news portal Axios.

U.S. President Donald Trump said Wednesday he was not yet satisfied with Iran's offers to make a deal, after Iranian state television reported details of what it claimed was a draft agreement.

The United States struck southern Iran on Thursday, drawing retaliation from Tehran against a U.S. military base, in the most serious clashes since an April ceasefire began.

Iran condemned on Thursday what it called violations by the United States after its strikes on the southern port city of Bandar Abbas, while vowing to defend its sovereignty.

Iran's Revolutionary Guards on Wednesday said a return to war with the United States was unlikely, while warning that the Islamic republic stood ready against any attack.

Russia fired more than 100 drones and two ballistic missiles at Ukraine overnight, the Ukrainian air force said Tuesday, as the country's foreign ministry noted that Moscow's recent threat to hit Kyiv especially hard from the air brought nothing new.

Russia on Monday urged foreign citizens, including members of diplomatic missions, to leave the Ukrainian capital as quickly as possible and told residents to steer clear of military and government facilities. It said that "systemic strikes" on Kyiv were being prepared.

Foreign ministers from Australia, India, Japan and the United States announced new initiatives on Tuesday on maritime security, port infrastructure and energy to boost cooperation in the Indo-Pacific to counter concerns about China's growing influence.

The announcements by the group of nations known as the Quad came after talks in New Delhi between India's Foreign Minister Subrahmanyam Jaishankar, U.S. Secretary of State Marco Rubio, Japanese Foreign Minister Toshimitsu Motegi and Australian Foreign Minister Penny Wong.

Iran warned Monday that, while some progress had been made, it was not yet close to striking a deal with the United States to end the Middle East war, after a weekend of mixed messages from Washington and Tehran.

World oil prices tumbled on renewed optimism about an agreement, after top U.S. diplomat Marco Rubio suggested a deal could be reached within the day -- but Iran's foreign ministry spokesman responded: "No one can make such a claim."

U.S. President Donald Trump has assured Israeli Prime Minister Benjamin Netanyahu he will hold firm on his demand for the dismantling of Iran's nuclear program as a condition in any final agreement with Tehran, a senior Israeli official told AFP on Sunday.