Kentucky Governor Andy Beshear said 11 people have also been injured and the number of casualties is likely to increase.
Mamdani will be the first Muslim and South Asian to lead the largest city in the US after a win over Andrew Cuomo.
Here are the key events from day 1,350 of Russia’s war on Ukraine.
Results expected shortly after polling stations close at 9pm on Tuesday (02:00 GMT on Wednesday).
Paramilitary Rapid Support Forces collecting bodies after deadly takeover of North Darfur capital, US researcher says.
Alexis Mac Allister scores second-half winner after Courtois makes a string of fine saves to deny Liverpool.
The US says the warring parties have agreed to a humanitarian truce
The US says the warring parties have agreed to a humanitarian truce
UN calls for all Gaza crossings to be opened to allow unimpeded deliveries of food and other humanitarian aid.
UN calls for all Gaza crossings to be opened to allow unimpeded deliveries of food and other humanitarian aid.