An oil bowser veered off the road after hitting four other vehicles including trishaws near Waskaduwa on the Bandaragama- Kalutara road yesterday afternoon, the Police said. The road had been flooded with oil leaking from the bowser. One was killed and several others were injured and were admitted to the Nagoda hospital in Kalutara. The cause of the accident is yet to be established. Morontuduwa Police post of the Wadduwa police are conducting investigations Pix by Siri Mahabellana