Explosions shake Tehran as US-Israel attacks intensify, marking eight days of conflict and retaliation from Iran.

Huge explosions have hit several locations across Iran, including the capital, Tehran, as the war that has ignited the Middle East entered its eighth day.

The United States-Israeli attacks sent up clouds of dark smoke in the Iranian capital early on Saturday, and Tehran retaliated by firing missiles at Israel.

The US has warned of a forthcoming bombing campaign that officials said would be the most intense yet in the weeklong conflict, which has already killed at least 1,230 people and is set to cause further casualties daily.

Much of the region has become embroiled in the war, with Tehran not only launching retaliatory strikes on Israel but hitting US assets across the Gulf.

Israel’s military said early on Saturday it had started a “broad-scale wave of strikes” on targets in Tehran.

“Iranians are now waking to day eight since the initiation of the US-Israeli air strikes targeting different facilities and places across the Iranian capital and elsewhere in the country,” said Al Jazeera’s Tohid Asadi, reporting from Tehran.

Continuous attacks have been occurring since midnight, he said.

“According to the latest reports, Mehrabad, which is one of the two main airports in the Iranian capital, was targeted. The nearby area was said to be affected, as well,” said Asadi.

Meanwhile, attacks have been taking place in other cities across the country – targeting not just military areas or political centres, but also residential areas, schools and hospitals, he added.

Amir-Saeid Iravani, Iran’s ambassador to the United Nations, told the UN Security Council on Friday that the US and Israel are bombing civilian areas in his country, stating: “These acts constitute clear war crimes and crimes against humanity.”

The continued fighting comes as US President Donald Trump’s administration approved a new $151m arms sale to Israel after Trump said he would not negotiate with Iran without its “unconditional surrender”.

Iran’s UN ambassador said the country would “take all necessary measures” to defend itself.

Iran’s strategy to ‘keep Israelis in shelters’

Meanwhile, Iran has continued to strike back at Israel.

The Israeli military said early on Saturday that it had detected another round of Iranian missile fire headed towards Israel, and a series of explosions were heard in Tel Aviv following the launches from Iran.

Missiles were also detected heading towards other parts of the country, including southern Israel.

“Since midnight, the Israelis have detected at least five ballistic missile launches coming into Israel from Iran,” said Al Jazeera’s Nida Ibrahim, reporting from Ramallah in the occupied West Bank.

“They have led millions of Israelis into shelters throughout the night, which is something that Israeli analysts say the Iranians are intending to do to put more pressure on the Israeli government – by keeping Israelis in shelters and by keeping these missiles launching coming at different times.”