The incident occurred in the state of North Carolina, after the storm broke a tree which has slammed into a car, killing the passengers, the NBC broadcaster reported.
The victims were later confirmed to be the journalists, who were covering the severe weather conditions in the state for the broadcaster.
“WYFF News 4 anchor Mike McCormick and WYFF News 4 photojournalist Aaron Smeltzer died Monday when a tree fell on their SUV … All of us at WYFF News 4 are grieving. We are a family,” the WYFF broadcaster wrote on Twitter.
A number of US states such Alabama and Florida, declared the state of emergency over Alberto last week, while over 5,000 people were evacuated in Cuba on Monday.