At least 19 people were killed in Tuesday's attack on Kabul's main military hospital, according to a health ministry official who did not want to be named
Afghan security forces have thus far held back the Taliban's attempt to take the city with the help of the Afghan air force, but operations were hampered by the presence of civilians in the area
Statement comes after Ankara, which has offered to run and guard the airport in the capital after NATO withdraws, has been in talks with the United States on financial, political and logistical support
"The towns and cities the Taliban have targeted are of strategic importance given their proximity to Kabul as some are on supply roads to the capital," said Kabul-based security analyst Bari Arez.
"The setbacks suffered by Afghan forces also indicate that they had not expected such Taliban offensives so soon" after the US military started the final withdrawal, he added.