A Walmart store in Santa Monica, California, has closed its eastbound lanes due to a landslide on Interstate Highway 1 after two people were killed and two others were injured, authorities said.

The store was closed for several hours Friday and reopened shortly before 8 p.m. local time (0300 GMT).

The Santa Monica Fire Department and Santa Clarita Police Department said they responded to a call about the landslide at the Walmart in the area of Highway 1 and Forest Street in Santa Claritas.

According to the California Highway Patrol, a truck driver was driving a vehicle that had just come off the highway and was struck by a rock about 1.5 miles east of the highway’s eastbound ramp.

The driver of the vehicle was transported to a local hospital with minor injuries, and the driver of a pickup truck was transported by air ambulance to the hospital with serious injuries.

The collision resulted in the collapse of the two truck drivers, according to a news release from the Santa Claritarians.

The Santa Clarite police department said a woman and two people in her late 20s and early 30s were hospitalized with minor injures.

They were identified as Daniel and Christina Hirsch of Santa Clarity, according the Santa Monica Police Department.

The other two were taken to a hospital with non-life threatening injuries, according police.

The Santa Claritians identified the victims as Daniel, who was in his 30s, and Christina, in her 20s.

The sheriff’s office said that two people who were walking the roads westbound were struck by rocks as they walked their dogs.

The deputies told NBC station KTLA that they believe the rocks came from a creek bed.

They say that rocks were also falling on the freeway.

“The creek bed has an old rock on it that’s been in the water for thousands of years, and it’s been a major problem,” Sgt. Eric Jones said.

The area is about three miles (5 kilometers) north of Highway 5 and just east of Interstate Highway 101.