From Barangay Lagdungan in Tapaz, the soldiers planned on meeting with other military units in the area. At around 10 a.m., however, the KM 450 truck they were riding was hit by a command-detonated explosive between Barangay Bagong Baryo and Barangay Switch and met by a hail of gunfire from the Red fighters.
Mula sa Barangay Lagdungan, Tapaz ang mga sundalo ay iikot sana sa iba pang yunit militar bandang alas-10 ng umaga nang pasabugan ang sinasakyan nilang KM 450 sa hangganan ng Barangay Bagong Baryo at Barangay Switch, Tapaz. Kasunod nito ay pinaulanan ng bala ang sasakyan.