By Alexander Cornwell, Parisa Hafezi and Jeff Mason TEL AVIV/DUBAI/WASHINGTON (Reuters) -Iranian missiles struck major Israeli cities on Monday while Israel's prime minister said his country was on its way to eliminating "threats" from nuclear and missile facilities in Iran and civilian casualties mounted on both sides.

The warning came on the fourth day of the conflict, when the Israeli military claimed it had achieved air superiority over the Iranian capital and could fly over the city without facing major threats.

Iranian media report new Israeli attacks on the west of the country on Monday, after Iranian strikes broke through Israel's iron Dome defences overnight.

Israeli President Isaac Herzog joins 'America's Newsroom' to discuss the latest escalation with Iran.

Britain on Monday advised its citizens in Israel to register their presence with the British government, saying it wanted to build up a picture of who is in the region in case they need assistance.

President Trump arrived in Canada for the G7 summit, where the Israel-Iran conflict will be a key issue for world leaders. NBC News' Gabe Gutierrez reports on the possible pressure Trump could face to de-escalate tensions between the countries.

(Reuters) -Tehran has asked Qatar, Saudi Arabia and Oman to press U.S. President Donald Trump to use his influence on Israel to agree to an immediate ceasefire with Iran in return for Tehran's flexibility in nuclear negotiations, two Iranian and three regional sources told Reuters on Monday.

By Paul Sandle, Giulia Segreti, Steven Scheer and Tim Hepher PARIS/JERUSALEM (Reuters) -France shut down the main Israeli company stands at the Paris Airshow on Monday for refusing to remove attack weapons from display,