Most areas of Sylhet city Tuesday went through a four-hour power cut due to glitch in Kumargaon grid line.Areas of the city including Zindabazar, Bandarbazar, Chauhatta, Amberkhana, Lamabazar, Rikabibazar, Nayasarak, Kumarpara, Shibganj, Sheikhghat and Taltala had been without power supply from 7 pm to 10.50 pm. At around 8 pm the department officials informed our  correspondent about the mechanical glitch in grid line. READ: Sylhet again jolted by successive earthquakes   Khandaker Mokammel Hossain, chief engineer of the Power Development Board (PDB) Sylhet, said there were some problems with the grid line and that’s why the power supply to the three feed lines of the city were suspended. However, he could not say the cause of the glitch. In November last year, a power transformer at the substation of the national grid line in Kumargaon was burnt in a terrible fire and Sylhet had to be without electricity for almost two days. READ: Angry rickshaw pullers lay siege to Sylhet Nagar Bhaban; several cars vandalised