IRAN launched a new wave of attacks today at Israeli and US bases and threatened that the United States would “bitterly regret” torpedoing an Iranian warship in the Indian Ocean, which a former leading Indian politician described as “premeditated.”

Israel said it had begun a “large-scale” attack on Tehran as the Iranians targeted Tel Aviv and Jerusalem. 

Iranian television said additional strikes also targeted US bases. 

The Israeli military said it launched attacks in Lebanon at the Hezbollah resistance group, and a “large-scale wave of strikes against infrastructure” in Iran’s capital, without elaborating. 

Explosions were heard in multiple locations in Tehran a short time later.

Iranian Foreign Minister Abbas Araghchi described the sinking of the Iranian frigate IRIS Dene by a US torpedo on Wednesday as “an atrocity at sea.”

At least 87 Iranian sailors were killed in the attack. The Sri Lankan navy managed to rescue some of the Iranian sailors whilst the US forces abandoned them to the sea.

Mr Araghchi said: “Frigate Dena, a guest of India’s Navy carrying almost 130 sailors, was struck in international waters without warning,” he wrote on social media. “Mark my words: the US will come to bitterly regret [the] precedent it has set.”

The sinking of the frigate, after having taken part in naval exercises in the area, was slammed by former Indian foreign minister Kanwal Sibal.

Posting to social media, Mr Sibal said: “The US submarine attack was premeditated as the US was aware of the Iranian ships’ presence in the exercise to which the US navy was invited but withdrew at the last minute.

“I am told that, as per protocol, ships in these exercises cannot carry any ammunition. It was defenceless.”

The US and Israel launched the unprovoked and illegal attack on Iran on Saturday, targeting Iran’s leadership and killing Iranian Supreme Leader Ayatollah Ali Khamenei as well as 175 people, mainly schoolgirls, in a primary school. 

So far, the war has killed at least 1,230 people in Iran, more than 70 in Lebanon and around a dozen in Israel, according to officials in those countries. The US has admitted to six military deaths, though Iran claims to have inflicted more.

The conflict has also spread across the region.

A drone crashed on Thursday near the airport in Nakhchivan, an Azerbaijan enclave that borders the north of Iran.

Another drone fell near a school and two civilians were injured, Azerbaijan’s Foreign Ministry said.

But Iran’s Deputy Foreign Minister Kazem Gharibabadi later denied Iran had targeted Azerbaijan, saying his country only strikes the military bases of its enemies that are active in the region.