Police on Wednesday said they have arrested an eighth criminal wanted for an attack on BJP leader Brijpal Teotia last month.Police officials in Lucknow said Manoj was nabbed near Manan Dhaam Duhai on the Delhi-Meerut Road.He was reportedly under electronic surveillance since the August 11 attack on the Bharatiya Janata Party leader in Ghaziabad district of Uttar Pradesh. Manish, Raj Kumar, Nishant, Rahul Tyagi, Jitendra alias Pope, Gaurav, Abhishek and Babbal were arrested earlier.Superintendent of Police (Rural) R.K. Pandey said about half a dozen other criminals were yet to be arrested.Manoj told the police that he left for Jaipur after giving a final touch to the plan to attack Teotia. Since then he had travelled to different areas. The police recovered a 32 calibre pistol and cartridges from his possession.