Explosions, Gunfire Hit Center of Afghan Capital

Afghan police officers near the site of an explosion in Kabul, May 24, 2013.

Children run away after an explosion in Kabul, May 24, 2013.

Afghan police officers help a wounded comrade out of his checkpost after an explosion in Kabul, May 24, 2013.

An Afghan police officer runs for cover after shootings and explosions in Kabul, May 24, 2013.

A wounded Afghan police officer is carried away from the site of an explosion in Kabul, May 24, 2013.