Cyberabad Police, in its petition, had earlier sought 15-day custody of Salman and told the court that it needed to further probe his alleged ISIS links.
It said the police wanted to know if anyone else was involved in his "plan to join ISIS" and to retrieve information from electronic gadgets seized from him.
After arguments and counter-arguments from the prosecution and defence, the court today allowed the petition of Cyberabad Police and granted it 10-day custody of Salman, who is presently under judicial remand.
Further, he intended to undergo training in Syria and return to indulge in anti-national activities in the country, they claimed. He was arrested under Unlawful Activities (Prevention) Act and Information Technology Act.