The man is understood to be Magdy El Nashar, a student at Leeds University who officers have been looking for as part of their inquiry into the blasts that killed 54 people and injured 700 on London's transport system on 7 July.

 

"I can confirm that a man has been arrested in Cairo," a police source said.

 

"We are aware of an arrest made in Cairo but are not prepared to discuss if we may or may not wish to interview [the person] in connection with this investigation," a spokeswoman for London's Metropolitan Police said on Friday.