Harun Thohir

Harun was later stationed at Sambu Island, Batam, Riau province, Indonesia, from where the team infiltrated Singapore on 7 March 1965 with 12 kilograms of explosives.

Usman and Harun were instructed to bomb a power station by their superiors, but they were unable to accomplish that mission since their target was tightly guarded and proceeded to find an easier target—an office building crowded with workers and the general public in Orchard Road.

[7] The team detonated a 12-kilogram high explosive, placed inside a blue traveling bag, inside the MacDonald House at 3:07 pm local time on 10 March 1965, killing three civilians, a Malay Muslim driver (Muhammad Yasin Kesit) and two Chinese women (Elizabeth Susie Choo Kay Hoi and Juliet Goh Hwee Kuang), who were office staff of a bank.

Usman and Harun were transferred to a Singapore marine police boat, on 13 March 1965,[8][9][10] where they claimed that they were a fisherman and farmer but later confessed to the bombing of the MacDonald House.

[11] In court, both men were represented by Francis Seow, Senior Crown Counsel, who stated that they were "mercenary soldiers" and were paid S$350 (about US$280) to carry out their assignment.