Delhi Police has arrested Abdul Karim Tunda alias Abdul Quddooss, one of India's top 20 wanted terrorists, and mastermind of over 40 bombings in the country, from Indo-Nepal border.

70-year-old Tunda, an expert bomb maker of terror outfit Lashkar-e-Toiba, was arrested Friday at around 3 PM from the Banwasa-Mehendarnagar border with Nepal, and brought to Delhi.

Tunda was one of 20 terrorists India had demanded the Pakistani government to hand over after the 26/11 Mumbai terror attack.

This list includes Laskhar-e-Taiba chief Hafiz Saeed, Jaish-e-Mohammed chief Maulana Masood Azhar and Dawood Ibrahim, amongst others.

Police said Tunda was wanted in 21 cases in Delhi alone that were committed in 1994 and in 1996-1998.

They said Tunda had trained young indoctrinated youths in preparing bombs with locally available materials like urea, nitric acid, potassium chloride, nitrobenzene and sugar, and planting them at crowded places to cause maximum casualties.

He was carrying a Pakistani Passport No AC 4413161 issued on 23 January, 2013 in the name of Abdul Quddus, Special Commissioner of Police (Special Cell) S N Shrivastava said addressing a press conference.

Abdul Karim Tunda worked as a carpenter, scarp dealer and cloth merchant till he attained the age of 40 years before becoming a radicalised jehadi militant.

His younger brother Abdul Malik (a carpenter) is reportedly the only immediate family member alive in India.