A British woman is being sought by Interpol on charges of possessing explosives in 2011 but is widely suspected as being a part of the terrorist attacks on a Kenyan shopping mall last week.

Samantha Lewthwaite, 29, was married to one of the four homicide bombers who launched an attack in London on July 7, 2005. Nicknamed the “white widow,” she has been closely linked to the al-Qaeda related terrorist organization al-Shabab. That group claimed responsibility for the Kenyan mall attack.

Interpol released a “Red Notice” which is the U.S. equivalent of a wanted poster for Lewthwaite. The statement says she is “wanted by Kenya on charges of being in possession of explosives and conspiracy to commit a felony dating back to December 2011”.

The notice means Kenyan authorities now believe Lewthwaite to be a global threat.

Interpol is on the scene of the attack helping to collect forensic evidence. Teams from the U.S., U.K., Germany and Canada have also gone to the site to help Kenyan authorities.