A Springfield, Va., woman was killed Tuesday afternoon after she lost control of her SUV on the Capital Beltway and crashed into a guardrail and tow truck, police said.

The woman, Kristin Bourkland, 35, was headed south on I-495 near Branch Avenue when she veered off the roadway and into a guardrail, police said. After that collision, her Chevrolet Equinox then veered back onto the Beltway and ran into a tow truck, police said.

Bourkland was taken to a nearby hospital and later pronounced dead, police said. It remains unclear why she veered into the guardrail, police said.

Matt Zapotosky covers the Justice Department for the Washington Post's National Security team.