SINGAPORE - Police in Singapore stepped up security around the venue of an international security conference Sunday following a shootout at a roadblock in which officers fatally shot one man and detained two others.

Police said in a statement Sunday that officers opened fire after a vehicle with three people aboard crashed through police barricades. Substances believed to be drugs were found on one of the two people detained. The third man was shot dead, police said.

Security around the conference venue was stepped up and traffic rerouted. Police said they were in control of the situation.