KATHMANDU: At least 21 persons were injured when a bus (Ba 2 Kha 2099) carrying pilgrims collided head-on with a truck at Chittapol in Bhaktapur along Araniko Highway on Thursday. The bus was carrying pilgrims headed for Panauti in Kavre from Gothatar. Inspector Shreeram Bhandari at the Metropolitan Police Circle at Jagati said 21 persons, including the bus driver Tirtharam Bhandari and truck driver Dipendra Prasad Sharma were injured.