• Four killed and dozens injured in a series of collisions

• Poor visibility from blowing dust likely contributed to the crashes

Four people were killed and dozens more injured in a series of crashes involving over 30 vehicles, including six trucks, on a Colorado highway on Tuesday after dust storms reduced visibility to near zero, authorities said.

Major Brian Lyons of the Colorado State Patrol said strong winds blew dust across the interstate south of Pueblo around 10 a.m., creating a “brown out” condition.

Twenty-nine people were taken to hospitals with injuries ranging from minor to severe, while crashes on both sides of the highway caused varying degrees of damage.

The southbound crash resulted only in property damage, the patrol added.

Among the affected vehicles was a pickup towing a trailer carrying 32 goats, four of which were killed, authorities said.

Investigators are looking into the causes of the accidents, considering the low visibility as a potential factor along with other possible contributing causes, according to patrol spokesperson Trooper Sherri Mendez.

Officials noted that the strong winds that hit eastern Colorado on Tuesday, combined with warm weather and extreme dryness, also helped fuel wildfires and delayed flights at Denver International Airport.