AGARTALA, July 21: The 687-year-old 'Kharchi' festival celebrating the unity and integrity between tribals and non-tribals began in Tripura yesterday. Thousands of devotees congregated to offer prayers at Khaerpur temple at Puratan Agartala, where the tribal priest called 'Chantai' offered first prayers to 14 idols. The week-long festival was inaugurated by Tripura Industries Minister Pabitra Kar, while Chief Minister Manik Sarkar greeted the people on the occasion. Elaborate security arrangements have been made in view of the festival.