Religious scholars said on Tuesday that suicide attacks have no legitimacy in Islam and instead tarnishes the image of this sacred religion.

"Islam has strongly condemned the killing of innocent people, it is a major sin," said religious scholar Mohammad Aslam Shiwa.

This comes after Monday's deadly bombing during a Shia ceremony at a mosque in Char Qala in Kabul, which killed over 30 people.

Critics have claimed that the recent spate of attacks against Shias in Afghanistan is a deliberate attempt to sow the seed of sectarian violence in the country. But Afghans feel such a move by the enemy will not destroy the national unity.

Rassould Dad lost two nephews in Monday's attack – one was six years old and the other was 12 years old.

"Allah blessed us with two sons after twenty years, but these oppressors snatched both from us and we buried both of them," said Rassould Dad.

Najib also lost his 13-year-old brother in the attack.

"This pair of shoes belonged to my brother, he came to the mosque, he was 13," said Najib.

Meelad was also among those killed in the attack. After school every day he would go to the mosque for lessons in the Quran. Meelad died in the attack and now all his family have to remind them of him is his school bag.

"Meelad's head was completely burnt and stones were visible in his head," said Mohammad Hussain, Meelad's uncle.

Critics have said that there appears to be an attempt by certain countries to instill sectarian violence in Afghanistan.

"There are certain countries conducting such brutal attacks and want to divide the people of Afghanistan so that they can pursues their own interests," said university lecturer Qasim Wahidi.

Monday's deadly attack on the Arbaeen ceremony marks the fourth attack on Shias in the past few months.

Daesh claimed responsibility for the bombing.

The group also said they carried out two attacks during the Shia ceremony of Ashura on October 11, in Kabul, and on October 12, in the northern province of Balkh, that altogether killed at least 32 people.

The group also claimed a July 23 attack against a demonstration by mainly Hazara Shia in Kabul, killing at least 85 and injuring 413, the deadliest attack in Afghanistan on civilians since 2002.