Uzbekistan's central elections commission says that Uzbeks have given overwhelming approval in a referendum to constitutional changes that promise human rights reforms but that also would allow the country’s president to stay in office until 2040.

Preliminary results from Uzbekistan’s presidential election show the incumbent leader winning a second five-year term in the tightly controlled Central Asian nation.

Uzbeks voted Sunday in a presidential election that the incumbent is expected to win in a landslide against weak competition.