Pakistan summoned the Indian ambassador on Friday to protest against the illegal entry of an Indian spy who Pakistan said was captured in the violence-plagued province of Baluchistan the previous day.

Rejecting Pakistan’s accusation, the ministry of external affairs of India said the person arrested has no link with the Indian government since his premature retirement from navy. It has no interest in interfering in internal matters of any country and firmly believes a stable and peaceful Pakistan is in the interest of the region.

The accusation could raise tension between the nuclear-armed rivals months after India blamed Pakistan-based militants for an attack on an Indian air base in which seven military personnel were killed.

“(Pakistan) conveyed our protest and deep concern on the illegal entry into Pakistan by a RAW officer and his involvement in subversive activities in Baluchistan and Karachi,” Pakistan’s foreign ministry said in a statement, referring to the message conveyed to India’s ambassador.