Abdul Karim Tunda alias Abdul Quddooss had visited Hyderabad for several times and conducted recee.He also supplied all the timing devices and the material which is used for bombing.According to the sources he has trained 10 to 15 people in south at Nalgonda district in the year 2005.He trains the youth for preparing bombs with locally available materials such as Urea, Potassium, Nitro benzene, Nitric acid e.t.c..This person is responsible for the bomb blasts in Hyderabad from Lumbini park blast to Dilsukh nagar blast.He is in top 20 wanted terrorist list.Even though he was 70 years old he is a master mind in making bombing outfits to Lashkar-e-toiba.Tunda was arrested at Banwasa-Mehendra nagar border by Nepali's and sent to Delhi.