New Delhi: Investigators looking into the recent blast near Delhis Red Fort are examining the role of a wider radicalisation network after the arrest of several individuals, including doctors and students from different states. New information suggests that the brother of one of the arrested doctors may have been in contact with radical groups, deepening concerns over how educated youth were drawn into extremist ideas.

Police officials say the case has revealed signs of self radicalisation among some of the suspects, including Dr Shaheen Shahid and her brother Parvez Sayeed. Investigators believe both drifted into extremist thinking over time and maintained limited interaction with family members as their views changed.

Family members of the arrested individuals, however, say they are

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