The Muslim teacher suspended for refusing to work without her veil is connected to a hard-line mosque where the ringleader of the July 7 bombers worshipped, a media report said on Monday.
The family of teacher Aishah Azmi, 24, plays a key role at the fundamentalist Markazi mosque in Dewsbury, West Yorkshire, which was attended by suicide bomber Mohammed Sidique Khan, the report claimed.
Until recently, Azmi's father was joint headmaster of the secondary school attached to the building. Her husband is Indian-born Ahmed Khan.
The family are known to worship at the mosque and may have encountered Khan before his terrorist act last year, Daily Mail claimed.
However, there is no suggestion that Azmi or anyone in her family have any connection with terrorism.
Tube bomber Khan and co-conspirator Shehzad Tanweer are said to have attended prayers at the mosque.
Khan, 30, who worked as a teacher in nearby Leeds, lived in Dewsbury with his Indian wife Hasima Patel before killing himself and six others in the Edgware Road blast last year.
The mosque is run by Tablighi Jamaat, a radical Islamic movement believed by intelligence agencies to be a fertile source for recruiting young extremists.
Two months ago, the Jamaat emerged as a link between several of the men arrested for the plot to use liquid bombs to blow up transatlantic airliners.
Richard Reid, the jailed shoe-bomber who tried to blow up a flight to America, also attended mosques run by the group.