Imam Sadiq Mosque in Kuwait City, June 26, after a bomb killed 27 during Friday prayers.

KUWAIT CITY — The emir of Kuwait said on Thursday his country had thwarted attempts to sow sectarian divisions after last month’s suicide bombing but warned that the world needs to do more to confront the “satanic” behavior of Islamist extremist militants.

An “Islamic State” suicide bomber blew himself up inside a Shi’a mosque in the Western-allied Gulf Arab state on June 26, killing 27 people in the worst militant attack in a decade.

Kuwaiti officials say the bombing appeared aimed at stoking sectarian hatred between Muslims in the country. Three Saudi brothers who helped the bomber, who entered the country from Saudi Arabia hours before the attack, have been arrested, Kuwaiti and Saudi authorities said on Tuesday.

“You have foiled the desperate attempt and satanic attitudes of the plotters and perpetrators of this condemned crime to inflame divisions and stir sectarian tensions and divide the unity of the Kuwaiti society,” Sheikh Sabah al-Ahmed al-Sabah told Kuwaitis in a Ramadan message aired on state television.

Up to 30 percent of Kuwait’s 1.4 million citizens are Shi’a Muslims, who have enjoyed relatively good relations with the country’s majority Sunnis. However, the Gulf Arab state sits on a fault line and shares its borders with Iraq and Saudi Arabia in a region that has been swept with sectarianism.