Police have taken the 11 suspects into custody for further questioning.
A statement stated that the members were identified by the provincial security and intelligence organisations.
Ugandan police have arrested another five people and discovered five more explosives around the capital, Kampala, in a bombing plot.
Identified by name as Kintu Ibrahim, the suspect was detained by police as he was about to stop at the Lubaga Miracle Center.
The observatory said the IS intensified its attacks in the desert region, noting that 387 people, mainly soldiers, have been killed since the beginning of 2023.
In 2020, the UN reported 3,035 civilians killed and 5,785 wounded.
The former grammar school boy was arrested at Heathrow airport on September 29, 2021 and charged with a string of terror offences.
They were responsible for 40 attacks and 57 deaths in 2022, an increase from 26 attacks and 34 deaths the year prior.
Based on intelligence from member states, the report said al-Qaida’s new de facto leader could not be announced for two reasons.
Seven suspects and the three others, all foreign nationals, were caught in simultaneous police operations.
