Pakistan lodged a strong protest with Afghanistan on Monday after a recent attack on a Rangers camp in Karachi, summoning the Afghan Charge d’Affaires and handing over a formal demarche, the Foreign Office said.

A Foreign Office spokesperson said Pakistan had registered its strongest protest over what it described as strong evidence of the direct involvement of Afghan nationals and networks based in Afghanistan in the attack.

Pakistan had made it clear that no such attack on its territory would be tolerated, the spokesperson said.

The protest followed Saturday night’s attack on a Rangers camp in Karachi’s Safoora area, where security agencies arrested an injured Afghan national identified as Usman, officials said.

According to officials, Usman told investigators he had entered Pakistan from Afghanistan’s Jalalabad area and that Abdul Hadi, Janan and Umar Farooq had assisted him in carrying out the attack.

Officials said Usman told investigators that Janan threw a bomb at the Rangers camp and that the group had entered Pakistan seven days before the attack. They were allegedly housed in an under-construction building, while Abdul Hadi brought the weapons from Waziristan.

Three Rangers personnel were martyred in the attack, while three attackers were killed in the ensuing exchange of fire, officials said.