An explosion has occurred close to the Ministry of Defence in the Afghan capital Kabul, a department official has told Reuters.
Witnesses separately reported hearing a large blast to the news agency.
The incident comes a day after the US secretary of defence Chuck Hagel arrived in the country on a surprise visit.
More top news
England and Wales fans will face a 24-hour alcohol ban in the centre of Lens when their teams play each other on June 16.
Cloud and rain set to spread westwards tomorrow bringing a colder feel.
Patrick Joseph Connors and his sons, Patrick Dean Connors and William Connors, kidnapped two men to keep them as "slaves" for 26 years.