The three gunmen who shot and killed six people at a mosque in Oman’s Muscat city in an attack claimed by Islamic State this week were all Omani nationals, police said on Thursday. The assault began on Monday evening at the Ali bin Abi Talib mosque in the Wadi al-Kabir neighbourhood of Oman’s capital Muscat as Shi’ite Muslims gathered. The Royal Oman Police said the three gunmen were brothers and “were killed due to their insistence on resisting security personnel”. It said that police investigations had indicated the three gunmen were “influenced by misguided ideas”.