International police body Interpol has issued a wanted persons notice for Briton Samantha Lewthwaite, at Kenya's request.
Ms Lewthwaite, 29, is the widow of one of the four suicide bombers who attacked London on 7 July 2005.Known colloquially as the "white widow", she has been linked with Somali militant Islamist group al-Shabab.
Interpol did not link the warrant to the Nairobi shopping complex attack that left at least 67 dead.
However, it comes after much speculation linking Ms Lewthwaite to events there.
Al-Shabab was behind the attack and subsequent four-day siege at the Westgate shopping complex in the Kenyan capital.