A woman has died after being hit by a van while chasing her dog on a motorway, according to police.
The 66-year-old was struck by the Ford Transit at about 6.15pm on Friday evening, and she was pronounced dead at the scene.
Detectives believe she had followed the dog after it ran on to the busy carriageway.
The affected stretch of the M4 near Cardiff was closed for five hours as an investigation took place.
South Wales Police is now appealing for any witnesses to contact 101.
The victim's family has been informed.