Even as investigations into the Karnataka terror plot thicken, the cops have now found that Abu Hamza, the main suspect in the attack on the Indian Institute of Science was planning to return to Bangalore.

Investigations revealed that the Riyazuddin Naseer had emailed Hamza asking him to return to Karnataka, so that more operations could be carried out jointly.

Hamza apparently is the man who along with Sabhahuddin allegedly carried out the attack at the Indian Institute of Science in December 2005.

The email transcript of Nasir to Hamza sent on November 1 2007 reads as follows:

'Hi, aap aa jao yahan. Sab clear hai. Bas aapka intezar hain aur jaldi aana bhai aur aaney se pehle iteyla kar de dena. Ok bye. Take care.' (Come back quickly. We are waiting for you. Before you come, inform us.)

Hamza had fled from Bangalore immediately after the IISC attack. According to his accomplice, Sabhahuddin who was arrested in Uttar Pradesh recently, Hamza had left for Kathmandu and then slipped into Pakistan.

The police say that based on the interrogation, Nasir had recruited over 12 students from various parts of Karnataka for a forthcoming mission and he wanted Hamza to join him too.

All those who were recruited by Nasir are in the age group of 12 to 23. The police are now trying to track down these persons also. 

Apart from this, the police have also received information that Nasir had collected information regarding a lot of tourist destinations in Karnataka.

Police suspect that he could have been planning an attack on several tourist destinations in the state of Karnataka also.

According to the investigators, Nasir had opened five email accounts once he returned from Pakistan after training.

During his training in Pakistan he was taught how to use the Internet.

Most importantly, he was told to delete emails out of the inbox's sent folder and also the trash counter.

However, the information which the police are now relying on are the few emails, which he could have forgotten to delete.