The two guards are probs part of the terrorists.
Anyway, I made a contract where Suchin Thanom, the gardener who's selling the tuktuk to Morgan, is a drug smuggler. He stashed a batch of heroin in the back of the tuktuk and plans to sell it to Morgan and his bodyguard. You are to blow up or steal the tuktuk.Search "Tuk-Fucked". I accidentally made an error in the briefing saying you have to dress as security to kill them, ignore that.