A homemade explosive device, planted in front of a store for fireboxes in the Bulgarian town of Vratza, went off last night at about 4.30 am local time, the correspondent of FOCUS News Agency informed. According to the information there are no victims. The windows of nearby stores have been shattered by the blast. The store is located close to a gas station and is on a busy street, and only the early hour has kept the incident casualty-free. The area is closed by police. Investigation is ongoing.