Security has been stepped up in the Afghan capital after a series of bomb attacks killed more than 50 people.
Eleven people, including a Nato soldier and eight contractors, were killed in an attack on a base in Kabul.
On Friday, at least 25 people died in a suicide bombing at a police academy and a truck bomb killed 15.
The UN said the attacks were likely to be the product of a Taliban power struggle following the death of its leader Mullah Omar.
The attacks, which happened within 24 hours of each other and injured hundreds, are the first major incidents since the Taliban confirmed last week he had died two years ago.
President Ashraf Ghani is due to hold a meeting of the National Security Council on Saturday to discuss the worsening situation and Afghan soldiers have been deployed across the capital to boost security.