Twenty-nine suspects were taken to court and after approximately ten sessions, most of them public, 15 were found guilty, with 7 to receive capital punishment (5 in absentia).

[9] In late May 2015, after the Qatif and Dammam mosque bombings, ISIL released a voice message calling on Muslims to clear the Arabian Peninsula of its Shia population.

[18] Eight of the deceased victims were sent to Peace Valley cemetery, in the Shia holy city of Najaf, Iraq, by an official state plane.

[19] The Islamic State of Iraq and the Levant identified the bomber as Abu Suleiman al-Muwahhid, and said in a statement posted on social media that he had targeted a "temple of the rejectionists" – a derogative term used towards Shias.

By the following day, Kuwaiti authorities had arrested several people in connection with the attacks, including the driver of the car that took the bomber to the mosque,[20] and the owner of the house he stayed in, which initial investigations showed that he is a supporter of "extremist and deviant ideology".

[21][22][23] The Ministry of Interior released a statement on its website two days after, identifying the perpetrator as Fahd Suleiman al-Qabba (born 1992[21]), a Saudi citizen.

[3] In his Instagram account, the arrested owner of the car,[18] posted pictures of him giving lessons to kids in a mosque in the Sulaibiya area.

[24] According to local newspapers, the perpetrators were told 20 days before to commit an operation that will "Shake Kuwait up", and let them choose the time and location.

After picking the location, they contacted ISIL leaders about their plans via WhatsApp and e-mail, and checked the mosque for a two-week period.

[27][28] On 14 July, the public prosecutor charged twenty-nine people involved in the attack – including the two Saudi brothers[29] – and one still at large.

[31] The Kuwaiti Ministry of Labor and Social Affairs closed down the Fahd Al-Ahmed Charity which it accused of financing extremist groups in Syria linked to the bombing.

[39][40] After receiving sufficient blood, the rest of the donors were told to come back after iftar – the meal eaten after sunset that marks the end of fasting.

[18] Parliament Speaker Marzouq Al-Ghanim said at the funeral: "The unity of the people of our country is incredible [...] If you look around you will see Sunnis and Shias, Kuwaitis and non-Kuwaitis, all present to give their condolences to the families of the victims.

"[49][50] The patriotic spirit manifested by the people of Kuwait and their love, devotion and allegiance to their homeland would fend off all criminal and terrorist acts.

[51] The Speaker of the Parliament at the time, Marzouq al-Ghanim, recalled the Emir's comment that "those are my children" after his security guards warned him about the dangers of going out in the open immediately after a terrorist attack.

[53] Three years after the incident, a surveillance footage showing the perpetrator walking inside the mosque and detonating himself, along with the immediate effects of the explosion was released.

[60] The Prime Minister, Sheikh Jaber al-Mubarak al-Sabah, visited the wounded and condemned the attack, saying, "This incident targets our internal front, our national unity.

"[13] The country's Minister of Justice and Islamic Affairs, Yaqoub Al-Sanea, called the attack "a terrorist and criminal act that threatens our security and targets our national unity".

[2] The Emir ordered re-construction of the mosque,[61] although a few days before a Sunni business owner said his company is ready to do it for free.