<span style="color: #222222;">In Sweden, a powerful explosion ripped through two adjacent apartment buildings in a southern city today, slightly injuring 25 people. </span><br />'' <br />'' <span style="color: #222222;">Officials said, the cause of the blast wasn't immediately known. The explosion blew out dozens of windows and destroyed balconies in the buildings in central Linkoping, about 175 kilometres southwest of Stockholm. <br />'' <br />'' Police said a bomb squad had been deployed to the area as a precaution after the blast. The area was sealed off by police.</span><br />'' <span style="color: #222222;"> </span>