"[The foreign ministers declare commitment to] improve mutually beneficial cooperation in regional trade, transport and communication, energy linkages, and transit opportunities," the declaration said.
It added that the so-called C5+1 format of five Central Asian foreign ministers and the US secretary will address climate change, work toward creating a favorable business and entrepreneurship climate, as well as uphold human rights. The diplomats expressed support for neighboring Afghanistan and pledged to fight terrorism and trafficking.
US State Secretary John Kerry arrived in the Kazakh capital of Astana for a three-day visit on Sunday, after trips to Kyrgyzstan and Uzbekistan, where the declaration was signed.
The US diplomat is due to travel to Tajikistan and Turkmenistan as part of his Central Asian tour.
