Islamabad- Senior police official said the twin bombings in Islamabad last night were not a security failure. SSP Operations Muhammed Ali Nekokaar said the explosives were rigged under a vehicle in the blast in Karachi Company located in sector G-9 of the city. He said that the blasts were not a security failure. Meanwhile the Islamabad police launched a search operation in different parts of the city. The entry and exit points of the city have been sealed and security arrangements have been beefed up.