British Transport Police (BTP) have released an image of a man they would like to speak to after two young children were reportedly assaulted in west London.
The incident happened at about 16:00 GMT on 11 December at White City Underground station, according to police.
The BTP said a woman was in the station with two young children when a man entered and kicked the children, causing them to fall over.
The man then “immediately walked away into the station and boarded an eastbound Central Line train”.
The BTP said: “Neither of the children suffered any injuries but were understandably upset and the woman incredibly shaken.
“Officers believe the man in the image could have information that may assist their inquiries.”
Anyone who recognises him, or who has information that could help police, should text BTP on 61016 or call 0800 40 50 40, the force added.