Iran threatened Wednesday to target U.S. bases across the Middle East if conflict breaks out, as the long-time foes prepare for new round of nuclear talks amid a standoff over uranium enrichment.

"All its bases are within our reach, we have access to them, and without hesitation we will target all of them in the host countries," Defense Minister Aziz Nasirzadeh said in response to U.S. threats of military action if the talks fail.

South Korea on Wednesday halted loudspeaker propaganda broadcasts into the nuclear-armed North, the defense ministry said, adding it was a bid to "restore trust" under Seoul's new administration.

The decision to suspend the broadcasts "was made to make good on a promise to restore trust in South-North Korea relations and seek peace on the Korean peninsula", the defense ministry said in a brief statement, adding the halt started Wednesday.

Los Angeles police began arresting people in the city's downtown late Tuesday, as groups gathered in violation of an overnight curfew after a fifth day of protests against Donald Trump's immigration crackdown.

Marines and additional National Guard troops headed to the Los Angeles area on Tuesday, sent in by President Donald Trump in response to protests over immigration raids despite the objections of the governor and local leaders.

The authorization came amid mostly peaceful protests in the country's second-largest city on Monday. Additional protests against immigration raids are expected to continue in other cities Tuesday.

At least four people were killed in Colombia on Tuesday as rebel groups detonated bombs near police stations in the city of Cali and the neighboring Cauca province, according to authorities.

Military and police spokespeople blamed the attacks on the FARC-EMC, a group led by former members of the Revolutionary Armed Forces of Colombia who broke away from the group after it signed a peace deal with the government in 2016.

A French middle school employee was stabbed to death by a 14-year-old student during a bag check Tuesday at their school in eastern France, authorities said. The student was detained.

A police officer helping with the bag checks was slightly injured during the arrest by the student, using the same knife he used against the school employee, the gendarme service said. The attack at the Francoise Dolto School in Nogent, north of the Burgundy city of Dijon, was being investigated.

Donald Trump made no secret of his willingness to exert a maximalist approach to enforcing immigration laws and keeping order as he campaigned to return to the White House. The fulfillment of that pledge is now on full display in Los Angeles.

The president has put hundreds of National Guard troops on the streets to quell protests over his administration's immigration raids, a deployment that state and city officials say has only inflamed tensions. Trump called up the California National Guard over the objections of Democratic Gov. Gavin Newsom — the first time in 60 years a president has done so — and is deploying active-duty troops to support the guard.

Iran's foreign ministry has said a new round of nuclear talks with the United States is being planned for Sunday, after President Donald Trump said it was expected on Thursday.

"The next round of Iran-US indirect talks is being planned for next Sunday in Muscat," foreign ministry spokesman Esmaeil Baqaei said in a statement Tuesday, adding foreign minister and chief negotiator Abbas Araghchi would this week attend the Norway's Oslo Forum, a gathering of conflict mediators.

Russia sent waves of drones and missiles in an attack on two Ukrainian cities early Tuesday that killed two people and wounded at least thirteen others, Ukrainian officials said.

Ukrainian President Volodymyr Zelenskyy in an online statement called the attack "one of the biggest" in the war that has raged for over three years, saying Moscow's forces fired over 315 drones, mostly Shaheds, and seven missiles at Ukraine overnight.

Police ordered the public to disperse from downtown Los Angeles after further unrest, with cars torched and security forces firing tear gas at protesters, in the wake of Donald Trump's deployment of National Guard troops to America's second-biggest city.