A suspected rebel who was injured by a teargas canister is still undergoing treatment at Mulago referral hospital.
The suspect indentified as Moses Kamuswaga is a resident of Kanyange LC1 zone Maganjo in Kawempe division.
His arrest comes after a teargas canister went off prematurely at night in his room.
On search police recovered four bullets, six unexploded tear gas canisters and pepper spray.
Kamuswaga who has refused to talk to the media is being guarded by police and has no attendant.
His arrest brings to 11 the number of people in custody linked to Revolutionary Force for the Liberation of Uganda rebel group.