A Delhi court sentenced a Pakistani to death on Wednesday for causing a bomb explosion in 1997 in a crowded bus, killing four people and injuring 24. Additional Sessions Judge OP Saini found convict Muhammad Hussain alias Zulfiqar alias Abdul Hassan, a native of Okara's Jindrakhar village in Pakistan, guilty of the crime and handed down the capital punishment after calling it a "rarest of rare" case. The court also fined Muhammad Hussain Rs 5,000. A bomb went off on a bus in West Delhi on December 30, 1997, injuring 28 passengers. Four of the injured later died in hospital, police said. A city court had discharged accused Abdul Rehman, Azhar Ahmed and Maqsood Ahmed in the case for want of evidence. Another accused, Abdul Karim alias Tunda, was absconding, police added.