Nupur Sharma, a spokesman for the party, had made derogatory comments about the Prophet Mohammed during a panel discussion on a news channel, and her comments were reportedly followed by anti-Islam comments by another party leader on Twitter.
According to Kabul police, seven gunmen attempted to storm the temple in the early hours of Saturday morning and were all killed after a standoff that lasted several hours.
ISIS-K said in its Telegram post that its suicide bomber Abu Muhammad al-Tajik had gained entry to the temple by throwing a hand grenade at the guard at the entrance and killing him.
“Armed with a rifle, pistol and hand grenades, he continued firing,” said the believers in the temple, ISIS-K.
A temple official said there were 30 people in the temple at the time.
ISIS-K also claimed its members clashed with Taliban government fighters trying to reach the temple, shooting them with a car bomb and four other explosive devices.
It said the clashes between ISIS-K and the Taliban fighters had lasted three hours and that the suicide bomber al-Tajik had been killed in these exchanges.
“The IEA” [Islamic Emirate of Afghanistan] strongly condemns the attack on the Hindu shrine in Kabul by the enemies of the Afghan people. The IEA extends its condolences to the families of the victims and assures that serious measures will be taken to identify and punish the perpetrators of this crime,” Taliban spokesman Zabihullah Mujahid tweeted, referring to the Sikh temple.
Afghanistan, once home to tens of thousands of Sikhs and Hindus, has seen numerous attacks on minority religious groups since the Taliban took over the country in 2021, following the withdrawal of US troops.
Last year, ISIS claimed another attack against the Sikh community that killed more than two dozen people at another temple in Kabul.
The United Nations Assistance Mission in Afghanistan (UNAMA) condemned the latest attack and called on Twitter for the “protection of all minorities in Afghanistan, including Sikhs, Hazaras and Sufis”.
The European Union ambassador to Afghanistan also condemned the attack, saying that “religious (and ethnic) pluralism must be protected with full force.”
India’s foreign ministry said it was “deeply concerned about reports coming from Kabul of an attack on a holy Gurdwara in that city.”