LAGOS( Reuters)-Nigerian rescuers searched for injured people on Tuesday night after a huge blast in Oyo state shook buildings and sent panicking residents onto the streets. The cause of the blast was not immediately clear while local media reported that some buildings had collapsed.... The explosion was heard in the Oyo state capital Ibadan, 130 km( 80 miles) from the commercial capital Lagos. Some residents said the blast shattered windows of their homes.... " Relevant agencies are carrying