Afghan security forces are combing the American University in the capital, Kabul, following a militant attack.
One person, reportedly a guard, died and at least 14 were injured in the assault which began with a huge blast.
Students and staff who were trapped inside the building are now believed to be safe, but the attackers remain at large, say reports.
It is unclear how many attackers there are. No group has so far claimed responsibility.
Police have described the attack, which began at about 19:00 local time (14:30 GMT), as “complex” and special forces were on the scene along with American military advisers.
One of those trapped inside was Massoud Hossaini, a Pulitzer Prize-winning photojournalist, who tweeted his experience and pleaded for help.
Read more: http://www.bbc.com/news/world-asia-37178241