A series of tornadoes have killed several people in the United States. US media reported on Saturday that at least ten people were killed and dozens injured, citing authorities and emergency services. A total of about 50 tornadoes that could be classified as hurricanes were counted in seven US states.

The states of Arkansas, Illinois, Indiana, Iowa, Wisconsin, Mississippi, and Tennessee were particularly affected, according to the weather service. According to data from poweroutage.us, tens of thousands of homes experienced at least temporary power outages.

In the small town of Belvidere, Illinois, the roof of an event building partially collapsed during a severe storm during a concert. At least one person was killed and dozens injured, according to the media. Fire chief Shawn Schadle said five people were hospitalized with serious injuries, 18 with moderate and five with minor injuries. At the time of the collapse, a storm was intensifying with strong winds of up to 145 kilometers per hour.

According to officials, 260 people were in the building when the roof collapsed. Concert tickets are sold out. Death metal bands Morbid Angel, Revocation and Skeletal Remains took part in the program at the Apollo Theatre. Belvidere has about 25,000 residents and is 100 kilometers from Chicago.

Hours ago, a tornado struck the town of Little Rock and the surrounding Arkansas region. Footage from local television channels shows uprooted trees, overturned vehicles and torn roofs. Pulaski County, to which the city belongs, reported one death. A spokesperson for the district told CNN that at least 50 people were hospitalized. The local rescue service in Little Rock expected 600 people to be injured Friday, according to a local broadcaster. But that fear wasn’t confirmed until Saturday.

Four more deaths were reported from the village of Wynne, about 150 kilometers away. Arkansas Governor Sarah Huckabee Sanders declared a state of emergency and mobilized 100 National Guardsmen to assist in the rescue and cleanup efforts. She spoke of significant damage and “a very difficult day” for the state.