These are the first pictures of a suspect being held by police investigating the Parsons Green Tube bombing.
Yahyah Farroukh, 21, is listed as living at an address in Stanwell, Surrey, which was searched by officers on Sunday.
He was arrested at a fried chicken shop where he worked in Hounslow, west London, on Saturday night.
Another 18-year-old was detained at Dover ferry port on Saturday morning.
Read more at Sky News.