India on Wednesday said it has become increasingly clear that 'state actors' were involved in executing the 2008 Mumbai terror attacks and that without state support the terror control room could not have been established in Pakistan.

Home Minister P Chidambaram said India knew who had trained Ajmal Amir Kasab and nine other terrorists who carried out the terror strikes in Mumbai, who briefed them and how the control room, from where directions were given, had functioned.

"It is no longer possible to deny that though the incident happened in Mumbai, there was a control room in Pakistan before and during the incident. Without state support, the control room could not have been established," he told reporters here.

Chidambaram said after Kasab's interrogation, evidence clearly pointed to the involvement of state actors and it was corroborated by the statement given by Syed Zabiuddin Ansari, alias Abu Jundal, who was arrested on June 21 after his arrival from Saudi Arabia.

"After Abu Jundal's interrogation, it was clear that there were state actors. Dots are increasingly getting joined.

Though there were many pseudonyms, it is clear that state actors were there. Pictures are getting clearer and clearer.

We have been able to know who were there and where they were," he said.

Dismissing Pakistan's claim that no state actors were involved in the 26/11 attacks, the Home Minister said no sovereign state could allow terror activities from its soil.

"I can't allow any non-state actor carry out any terror activity in a neighbouring country," Chidambaram said.

Asked whether New Delhi would hand over Islamabad any dossier on Jundal during today's Foreign Secretary-level talks, he said no dossier would be given at this stage but Foreign Secretary Ranjan Mathai was free to share whatever he has been briefed about.

"The Foreign Secretary has been briefed. If he feels, he can share it with them," he said.