A man posing as a gardener to get close to a group in Boulder holding their weekly demonstration for the release of Israeli hostages in Gaza planned to kill them all with Molotov cocktails, authorities said Monday.

But he had second thoughts and only threw two out of the 18 incendiary devices he had into the group of about 20 people, yelling "Free Palestine" and accidentally burning himself, police said. Twelve people were injured in the Sunday attack. He had gas in a backpack sprayer but told investigators he didn't spray it on anyone but himself "because he had planned on dying."

Neymar has apologized for a red card that he says cost Santos a victory in the Brazilian league, claiming that "desperation" to score led to the mistake in what could be his final match with the club.

Neymar was sent off in the 76th minute of Santos' 1-0 loss to Botafogo at home on Sunday after using his hand to score a goal.

Russian President Vladimir Putin is stalling at the peace table while preparing a new military offensive in Ukraine, two senior U.S. senators warned Sunday, arguing that the next two weeks could shape the future of a war that has already smashed cities, displaced millions and redrawn Europe's security map.

Republican Sen. Lindsey Graham and Democratic Sen. Richard Blumenthal spoke to The Associated Press in Paris after meeting President Volodymyr Zelenskyy and touring neighborhoods shattered by what they called the worst Russian bombardments since the full-scale invasion began.

Conservative Karol Nawrocki won Poland's weekend presidential runoff election, according to the final vote count on Monday. Nawrocki won 50.89% of votes in a very tight race against liberal Warsaw Mayor Rafał Trzaskowski, who received 49.11%.

The race had Poland on edge since a first round of voting two weeks earlier, revealing deep divisions in the country along the eastern flank of NATO and the European Union.

The United Kingdom will build new nuclear-powered attack submarines, get its army ready to fight a war in Europe and become "a battle-ready, armor-clad nation," Prime Minister Keir Starmer said Monday, part of a boost to military spending designed to send a message to Moscow — and Washington.

Starmer said Britain "cannot ignore the threat that Russia poses" as he pledged to undertake the most sweeping changes to Britain's defenses since the collapse of the Soviet Union more than three decades ago.

Iranian, Egyptian and U.N. leaders met in Cairo on Monday to discuss Iran's nuclear program after a report from the U.N. nuclear watchdog agency said that Iran is further increasing its stockpile of uranium enriched to near weapons-grade levels.

Rafael Mariano Grossi, the director-general of the Vienna-based International Atomic Energy Agency, said that the agency compiled the report, because Iranian's uranium enrichment was an ongoing concern for the IAEA's board of governors.

Iranian Foreign Minister Abbas Araghchi said on Monday that a nuclear deal would not be possible if the goal is to "deprive Iran of its peaceful nuclear activities".

"If the goal of the negotiations is to gain reassurance and confidence that Iran is not seeking nuclear weapons, then in my view, reaching an agreement is possible," he said in a joint press conference with Egyptian foreign minister Badr Abdelatty. "But if the goal is to deprive Iran of its peaceful activities, then certainly no agreement will be reached," he continued.

Ukrainian President Volodymyr Zelensky arrived Monday in Vilnius for a summit with the leaders of NATO's eastern and Nordic members, some of Kyiv's staunchest backers amid the Russian invasion.

Zelensky's spokesman said he would hold "bilateral meetings" on the sidelines of the summit in the Lithuanian capital, which will also be attended by NATO Secretary General Mark Rutte.

Delegations from Russia and Ukraine ended their latest peace talks Monday in Turkey after just over an hour, Ukrainian President Volodymyr Zelenskyy and Russian state media said.

Speaking in Vilnius, Lithuania, Zelenskyy said both sides "exchanged documents through the Turkish side, and we are preparing a new release of prisoners of the war."

Tehran called on Washington to provide a formal guarantee that it will lift sanctions imposed on Iran in ongoing talks on the Islamic republic's nuclear program.

"We want to guarantee that the sanctions are effectively lifted," foreign ministry spokesman Esmaeil Baqaei told a news conference Monday in Tehran. "So far, the American side has not wanted to clarify this issue."