zakiur rehman lakhvi was allowed to leave adiala prison in rawalpindi late on thursday .
his release was slammed with indians calling it an ` insult ' to the victims of the three-day onslaught , which was blamed on the banned pakistani militant group lashkar-e-taiba -lrb- let -rrb- .
pakistani security personnel escort zakiur rehman lakhvi , the alleged mastermind of the 2008 mumbai attacks , as he leaves court after a hearing in islamabad on january 1 .