Khartoum, 16 Jul - (ANA) - The alleged mastermind of a twin bomb attack in Nigeria's capital Abuja, which killed 75 people, has been extradited from Sudan back to Nigeria. Aminu Sadiq Ogwuche was reportedly arrested in Khartoum in May after Interpol issued an arrest warrant. He is accused of planning the Nyanya bus station bombings earlier this year, which Boko Haram said it carried out. Thousands of people have been killed in the group's violent campaign to establish an Islamic state in Nigeria.

Who are Boko Haram?

Founded in 2002

Initially focused on opposing Western education - Boko Haram means "Western education is forbidden" in the Hausa language

Launched military operations in 2009 to create Islamic state

Thousands killed, mostly in north-eastern Nigeria - also attacked police and UN headquarters in capital, Abuja

Some three million people affected

Declared terrorist group by US in 2013 (ANA)

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