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

Iranian news media and residents of Tehran say the damage from the latest Israeli strikes appears to be significant, with several apartment buildings badly damaged. Residents say they are hearing ambulance sirens and fire trucks racing to the scenes and rescue workers are working to find casualties in the rubble.

Israel struck Iran’s state-run television station during a live broadcast, forcing a reporter to run off camera following an explosion, after Iran fired a new wave of missiles at Israel that killed at

While in Canada at the G-7 summit, President Trump resisted signing onto a planned statement that the Canadian delegation had been working up related to de-escalation between Israel and Iran, according to people familiar with the talks.

A White House official said President Trump had decided not to sign onto a statement drafted for Group of 7 allies that urges restraint from both Israel and Iran, which have been trading attacks for days.

The Group of Seven summit has opened in Canada with world leaders scrambling to contain the escalating conflict between Israel and Iran over Tehran’s nuclear program.