A ceasefire between Iran and Israel has not ended the threat of cyberattacks from hacking groups supportive of Tehran, the FBI and federal cybersecurity officials warned Monday.

In a public bulletin, the authorities warned that hacking groups affiliated with or supportive of Tehran may still seek to disrupt or disable critical infrastructure systems in the U.S. such as utilities, transportation and economic hubs. Hackers may also target defense contractors or other American companies with ties to Israel, the agencies said.

A heat wave covered much of Europe on Monday, with a record-hot first day of play at Wimbledon and high winds fanning forest fires in Turkey.

Heat warnings were issued for parts of Spain, Portugal, Italy, Germany and the U.K., with new highs expected on Wednesday before rain should bring respite to some areas.

Iraq's top court was set to resume work Monday after nine judges who had tendered their resignations in recent weeks returned to work following the retirement of the court's president and the appointment of a successor.

Iraq's Supreme Judicial Council announced Sunday the retirement of the head of the Federal Supreme Court, Judge Jassim Mohammed Abboud Al-Amiri, citing "health reasons." The Council nominated Judge Mundher Ibrahim Hussein, deputy president of the Federal Court of Cassation, to assume the position, and Hussein was appointed by presidential decree on Monday.

President Donald Trump signed an executive order on Monday ending many U.S. economic sanctions on Syria, following through on a promise he made to the country's new interim leader.

White House press secretary Karoline Leavitt said the move was designed to "promote and support the country's path to stability and peace."

Dozens of Israeli settlers rampaged around a military base in the Israeli-occupied West Bank, setting fires, vandalizing military vehicles, spraying graffiti and attacking soldiers, the military said.

Sunday night's unrest came after several attacks in the West Bank carried out by Jewish settlers and anger at their arrests by security forces attempting to contain the violence over the past few days.

Temperatures in southern Spain soared to 46 degrees Celsius (115 degrees Fahrenheit) on Saturday, a new record for June, the national weather agency said on Monday.

The mercury climbed to its new high at 4:40 pm in Huelva, near the border with Portugal, edging out the previous record, 45.2C that was set in 1965 in Seville, it said.

Russia launched its biggest aerial attack against Ukraine overnight, a Ukrainian official said Sunday, part of an escalating bombing campaign that has further dashed hopes for a breakthrough in efforts to end the 3-year-old war.

Russia fired a total of 537 aerial weapons at Ukraine, including 477 drones and decoys and 60 missiles, Ukraine's air force said. Of these, 249 were shot down and 226 were lost, likely having been electronically jammed.

Many of the world's nations are gathering starting Monday in Spain for a high-level conference to tackle the growing gap between rich and poor nations and try to drum up trillions of dollars needed to close it. The United States, previously a major contributor, pulled its participation, so finding funding will be tough.

The four-day Financing for Development meeting in the southern city of Seville is taking place as many countries face escalating debt burdens, declining investments, decreasing international aid and increasing trade barriers.

It's been a week since the United States pressed Israel and Iran into a truce, ending a bloody, 12-day conflict that had set the Middle East and globe on edge.

The fragile peace, brokered by the U.S. the day after it dropped 30,000-pound "bunker-busting" bombs on three of Iran's key nuclear sites, is holding. But much remains unsettled.

U.S. President Donald Trump on Sunday urged progress in ceasefire talks in the 20-month war in Gaza between Israel and Hamas, though some weary Palestinians were skeptical about the chances. Israel issued a new mass evacuation order for parts of northern Gaza.

Ron Dermer, a top adviser to Prime Minister Benjamin Netanyahu, was set to travel to Washington this week for talks on a ceasefire, an Israeli official said, and plans were being made for Netanyahu to travel there in the coming weeks, a sign there may be movement on a deal.