 Several Canadian vehicles were lost and four Canadian soldiers were killed and nine were wounded in the intense fighting.Explosions echoed across grape and pomegranate fields and clouds of dust rose amid the greenery and dried-mud houses of the Panjwayi district, which is about from Kandahar city.After Operation Medusa started, authorities in Kandahar warned people not to travel off the main highway in the province, which leads into Panjwayi.