Four army soldiers were killed and 10 others injured in highway accident in Jammu and Kashmir's Samba district, a defence spokesman said on Thursday.The accident took place on Wednesday evening when the driver lost control of the Army vehicle on the National Highway in Jatwal, the spokesman told IANS."The vehicle which was on its way from Amritsar to Akhnoor when it turned turtle," he said.The soldiers were on their way to a rifle training drill.Traffic on the usually busy Pathankot-Jammu national highway was halted for an hour after the accident.