A child in a buggy was blown on to the tracks at a London Underground station - just seconds before a train arrived.
In "frightening" CCTV footage released by British Transport Police, a couple are seen leaving the pushchair at the bottom of the stairs close to a platform while they went to assist other family members on the evening of July 23.
But a strong gust of wind blew the unattended buggy carrying the child on to the tracks with an incoming train moments away from arriving.
After realising what had happened, the child's mother rushed on to the tracks to carry the baby and the pushchair back on to the platform.
Police are attempting to trace the couple involved to ensure the child did not suffer any injuries in the "frightening" incident.
“This was a frightening incident, not just for the scale of the danger the child was exposed to, but also because the woman then put her own life on the line by going onto the tracks," chief inspector Mark Lawrie said.
“We urgently need to identify the people involved to ensure the child wasn’t injured as a result of the fall onto the tracks.
“I have taken the step of releasing CCTV of the people involved to highlight the very real concern we have for all involved.”
In the wake of the incident, BTP has warned the public to be aware of busy platforms and gusts of wind which can blow through tunnels.
Police urged anyone with any information about the incident to call on 0800 40 50 40 or to contact Crimestoppers on 0800 555 111.