"I am very happy (about conviction of Kasab). But I regret the acquittal of two other accused Fahim Ansari and Sabauddin Ahmed. The court has given them benefit of doubt. We will challenge their acquittal," Nikam said.
"I will recommend to the government to challenge the acquittal of the two in a higher court," he said.
Nikam said that certain circumstantial evidence were not accepted by the court but he hoped that those evidence will be accepted by the higher judiciary.
On the verdict against Kasab, Nikam said that the judgement proved Pakistan links in terrorist attacks carried out against India.
"Kasab has been declared guilty on charges of waging war against the Indian state. Today we conclusively proved how terrorists are trained in a neighbouring country, how terrorist activities go on there," he said.