Emergency services have been working to secure the area following Monday’s trolley-bus explosion in Volgograd.<br /><br />Russian Health Minister Veronika Skvortsova arrived in the city after Sunday’s train station explosion.<br /><br />She spoke from the scene of Monday’s blast.<br /><br />“All the people injured have serious injuries,” she said. “They’re suffering from burns and multiple traumas – typical injuries after an explosion.”<br /><br />An eyewitness account of Volgograd’s second blast in two days described the destruction Monday’s explosion caused.<br /><br />“I heard a loud bang and soon after, people were shouting,” said the witness. “I thought it was strange and wondered what happened, and continued to the bus stop. When I got closer, I saw what had really happened. It was not a fire cracker, it appeared to be an explosion. At first, I did not realise it was a trolley-bus. People around were saying: ‘trolley-bus, trolley-bus!’ It was such a wreck that at first sight, it did not look like a trolley-bus.”<br /><br />Monday’s blast will undoubtedly raise fears for security ahead of the February 2014 Winter Olympics in Sochi.