Kathmandu. Two children have died in a hand grenade attack in a house in Dahivala, a suburb of Colombo, the capital of Sri Lanka, on Friday morning. Police said their father was injured in the attack.According to police, the 10 and 14-year-old children were admitted to the hospital for treatment. Both children died during treatment. The injured father is undergoing treatment at the same hospital.Police have initially suspected that the attack could be the result of an ongoing conflict between two organized criminal gangs. Police said further investigation into the incident has been started....