An explosion near a school in the Afghanistan capital Kabul today killed at least 25 people and injured dozens others.<br />'' <br />'' Afghanistan's Interior Ministry spokesman Tariq Arian said at least 52 people, most of them students, were injured in the blast. However, he did not specify the cause or the target of the explosion. Ghulam Dastagir Nazari, spokesman for the Afghan health ministry said that 46 people had been taken to hospitals so far.<br />'' <br />'' Kabul is on high since Washington announced plans last month to pull out all US troops by September 11, with Afghan officials saying Taliban have stepped up their attacks across the country.<br />'' <br />'' No group has claimed responsibility for the blast.<br />''  <br />