Karachi: The Crime Investigation Department police had warned the high-ups about a possible attack on its office a couple of weeks ago.
A CID official, who wished to remain anonymous, disclosed that some culprits arrested a couple of weeks ago had revealed during the course of investigation that an attack on the CID office was being planned, the Daily Times reported.
The terrorists carried out the attack as planned, the official added.
It is pertinent to mention that two stolen police mobiles could be used in terrorist activities.
On Thursday night, militants had rammed a truck laden with some 1,000 kilograms of explosives into Karachi's CID compound, which is only hundreds of meters away from the United States consulate, the provincial chief minister''s residence, and numerous luxury hotels.
The massive explosion destroyed the anti-terrorism police compound and seriously damaged adjacent residential buildings, which were covered by smoke and clouds of dust.
Police officials said that they had taken seven people into custody for questioning.