Security in Kuwait’s oil sector has been raised to its highest level in the wake of the bomb attack on the Imam al-Sadiq Mosque in Kuwait City on 26 June.

“All KPC [Kuwait Petroleum Corporation] sites, including oil fields and refineries, operate normally and regularly under the tightened security measures,” Sheikh Talal al-Khaled al-Sabah, a spokesperson for the oil sector, told the state-controlled news agency Kuna on 27 June.

Separately, Khaled al-Asousi, a spokesperson for the state-run Kuwait National Petroleum Company (KNPC), said that “extra monitoring and searches” were being carried out at KNPC oil installations.

The militant group Islamic State in Iraq and Syria (Isis) has claimed responsibility for the attack, which killed 27 people and wounded more than 200.