Kathmandu: An indefinite curfew continued in several parts of Nepal's India-bordering Sunsari district in the Koshi province for a fourth day on Thursday, following communal violence that left one person dead and several injured. The security situation in the district is gradually improving, said Assistant Chief District Officer, Sunsari, Poshan Lamichhane. The district administration has extended the curfew, first imposed on Monday, to ten areas, including the East-West Highway, to control the situation. Under the curfew, the movement of people, gathering, demonstration, public meeting and sit-in are strictly prohibited. Prime Minister Balendra Shah has called a meeting of the National Security Council on Thursday to review the security situation in the country, especially in Sunsari district.