In an operation undertaken on the night of April 29, 2002, Yarden Morag and Shlomo Dvir drove a vehicle with a trailer to East Jerusalem. They were initially stopped near the Beit Orot Yeshiva by Mount Scopus, because it was irregular for Jews with skullcaps to drive in Palestinian areas of East Jerusalem, at night. They were not detained, since police accepted their excuse that they were on their way to a yeshiva. The same police officers, Shimon Cohen and Barak Segev, later sighted the same vehicle near a girls' school, close by the Al-Makassad hospital in the At-Tur neighbourhood. The officers stopped the two and examined the car, finding that the trailer had two containers of gasoline rigged to two TNT bricks, and propane gas tanks. The explosive charge consisted of a vergin (military battery), and the device, in a baby carriage, was timed to explode at 7:35 am., when dozens of girls would have been entering the schoolgrounds. Later investigations revealed this was not a one-off strike, but rather, part of a West Bank network of settlers conducting a campaign against Palestinians. Israeli intelligence soon heard of a large cache of weapons, and suspected it might imply an attack on the Temple Mount was being prepared.