Intense Israeli airstrikes targeted Iran's capital early Wednesday after it issued a warning about a new area it could target, a day after U.S. President Donald Trump warned Tehran's residents to evacuate and demanded that the country surrender without conditions.

The Israeli military said Monday that it can now fly over the country's capital, Tehran, without facing major resistance after crippling Iran’s air defenses in recent strikes, enabling Israel to hit an expanding range of targets with relative ease.

Trump left the Group of Seven summit in Canada a day early to deal with the conflict between Israel and Iran. He told reporters he was looking at something “better than a ceasefire.”

The Israeli military said it was conducting strikes in the Tehran area early Wednesday local time. The announcement came shortly after it warned residents of a Tehran district to evacuate, saying that it would be striking at military infrastructure in coming hours.

Israel attacked Iranian state television after Iran fired another wave of missiles at Israel on the fourth day of open warfare between the regional foes.

Iranian security forces on Tuesday arrested a "terrorist team" linked to Israel with explosives in a town southwest of the capital Tehran, Iranian state media reported.

Israel and Iran have begun a new round of attacks, as the conflict between the two heavily armed rivals enters its fourth day.

Israel’s military said it has destroyed more than 70 Iranian air-defense missile batteries. The strikes, which involved waves of fighter jet attacks, targeted missile launchers and radar systems spread across Iran.

Ayatollah Ali Khamenei has spent almost four decades as Shi'ite Iran's supreme leader building a regional power to rival the Sunni states across the Gulf and implacably hostile to the U.S. and Israel - while crushing repeated unrest at home.