The conference demonstrates international support for peace talks between the Afghan government and the Taliban, stakeholders say. The Taliban failed to participate.
The Taliban has not yet confirmed whether they will attend a high-level conference in the Uzbekistani capital next week.
An intensifying air and ground campaign is 'only going to get worse' for the Taliban, said US Gen. John Nicholson.
Afghan President Ashraf Ghani's offer to the Taliban was 'a dignified process for reaching a political framework', a US diplomat said.
The Afghan government outlined its offer for peace --- which comes without any preconditions -- at the second round of the Kabul Process peace conference
Uzbekistan is demonstrating its readiness to support the Afghan government's effort to build a peaceful future, officials and specialists say.
The talks, which came at the end of a three-day visit by UN Security Council representatives, focused on political, socio-economic, human rights and security issues in Afghanistan.
Central Asian security, bilateral trade and infrastructure development were among the topics during Afghan President Ashraf Ghani's visit to Tashkent earlier this month.
'Our main duty is to end the war and begin the peace negotiations,' said HPC Chairman Mohammad Karim Khalili.
The leaders of the two countries oversaw the signing of dozens of agreements and trade contracts worth more than $500 million.