The email purportedly sent by outlawed Indian Mujahideen owning up the attacks outside Jama Masjid and threatening more strikes ahead of Commonwealth Games has been traced to Borivali area of Mumbai, police said on Tuesday.

The mail was sent using a Tata phone connection procured through a fake identity card. One person is understood to have been questioned by Delhi police in this regard. Police suspect the person has some link to the firing incident.