Staff Reporter :At least six persons sustained burn injuries when miscreants hurled petrol bomb into a CNG-run auto-rickshaw at Kazipara and Dhaka university on Sunday evening, on the eve of the BNP-led 20-party alliance’s countrywide dawn to dusk hartal for today (Monday).They were admitted to the burn unit of the Dhaka Medical College and Hospital (DMCH), Inspector Mozammel Haque of the DMCH Police Outpost said.At least two buses and a CNG auto-rickshaw were torched and 10 others vandalized in the capital by the pickets following the hartal.Meanwhile, over eight crude cocktail bombs and a petrol bomb were blasted in front of the BNP’s Nayapaltan central office, in the Dhaka University (DU), area Abdullahpur, Kuril areas and other parts of the capital by defying the tight security measures of law enforcing agencies, police and fire brigade sources said. Border Guard Bangladesh (BGB) started patrolling the city streets from Sunday evening to meet emergency while other intelligence agencies have also been deployed, BGB and Detective Branch of Police sources said. The BGB men were deployed at different strategic points of the city from 6pm to help maintain the law and order, said BGB’s Public Relation Officer Mohsin Reza.He said that the forces would remain in the streets until further instruction.Quoting the witnesses, Fire Service and Civil Defense Directorate’s Duty Officer Forhad Hossain said that a staff bus of Public Administration Ministry was torched by the miscreants in the city’s Paltan intersection area around 6:10pm while a CNG run auto-rickshaw and another parked bus were also torched at Kazipara and Kilgaon areas respectively after nightfall. Activists of Islami Chhatra Shibir and Chhatra Dal vandalized at least 10 vehicles near the Nayapaltan BNP office, Nabisco intersection and Nayabazar, police said. Rapid Action Battalion (RAB) is also patrolling the city streets, RAB and pedestrian sources said.The BNP-led alliances on Sunday announced the dawn-to-dusk shutdown protesting Section 144 to foil its scheduled Gazipur rally and demanding the release of its arrested leaders and workers.