The Border Security Force (BSF) has cancelled the 'Retreat' ceremony at the Attari-Wagah border joint check-post (JCP) at Attari, 30 km from Amritsar, officials said on Thursday.The BSF and district authorities have asked visitors and tourists not to move towards Attari for the ceremony on Thursday. It is not clear when the ceremony will resume.The Retreat ceremony is carried out by border guards of India and Pakistan, the BSF and Pakistan Rangers, at the Attari-Wagah JCP at sunset every evening.The 30-minute ceremony is watched by hundreds from both countries daily.