In 2001, Ja'afar bin Mistooki (detained in Jan 2002) led his fiah ayub members [Ab Wahab bin Ahmad (Wahab), Syed Ibrahim (Ibrahim) and Mohammad Aslam bin Yar Ali Khan (Aslam is currently detained by the Afghan authorities in Kabul)] to recce the water pipelines at the Singapore-Johor Causeway, water pipeline off Hindhede Road, the PUB Woodlands Water Booster Station, the Bukit Panjang Service Reservoir and the Bukit Timah Waterworks opposite the Kandang Kerbau Women's and Children's Hospital.

ISD recovered two sets of photographic negatives on these recces in its search of Wahab's home. One set of photographic negatives contained recce photographs of the water pipeline off Hindhede Road, and the other set contained recce photographs of the Bukit Panjang Service Reservoir and the PUB Woodlands Booster Station.