Thousands of Iranians attended a funeral on Tuesday to mourn 165 students killed in Saturday's U.S.-Israeli strikes on a school in the city of Minab.
While Iran condemned Israel for the attacks, Israel said it was not aware of the strike on the school.
Joint military strikes launched by the U.S. and Israel on Iran on Saturday morning have triggered a sharp escalation across the Middle East in recent days, setting off waves of missile exchanges, mounting casualties, and far-reaching political and security repercussions.
Israel continued its strikes on Tehran, with Iran's state media putting the death toll from the past four days of joint U.S.-Israeli attacks at 787 as of Tuesday.
Iran has carried out more retaliatory strikes across the Middle East, including on targets in Israel, Bahrain, and Saudi Arabia.
Iran's Islamic Revolutionary Guard Corps said the Strait of Hormuz is now closed, and warned that any vessels attempting to pass through will be targeted.
U.S. President Donald Trump told the New York Times on Sunday that the conflict with Iran could continue for more than a month.
Thousands attend funeral in Iran for students killed in US-Israeli strikes
A group of demonstrators gathered in Bulgaria's capital Sofia on Monday to protest against U.S. and Israeli strikes on Iran.
The protesters rallied with signs reading "Do not engage war in Iran" and "We do not welcome U.S. military aircraft", to show solidarity with Iran.
"No one has the right to launch an attack on a sovereign country or interfere in its decisions," said Kostadin Kostadinov, chairman of the Bulgarian Revival party, while delivering a speech at the rally.
"The U.S. military equipment should not be brought to Bulgarian territory and the territory cannot be used in any form for military operation against Iran. We demand the U.S. military planes to immediately leave Bulgarian territory. This is not our war. The Iranian people are not our enemy. Iran is not our enemy," Petar Nikolaev Petrov, deputy chairman of the Bulgarian Revival party, said in his speech.
Several U.S. military planes have been deployed at Sofia Airport in recent days, though the Bulgarian government denied that they were linked to U.S. military operations.
The U.S. and Israel on Saturday launched strikes against Iran, plunging the war-torn Middle East into a new round of violence. Iran has retaliated with a series of counterattacks against Israel and U.S. targets across the region.
Protesters rally in Bulgaria against US-Israeli strikes on Iran
