New Delhi: The Punjab Police on Friday, May 13, said five persons, including the key conspirator, were arrested in connection with the rocket-propelled grenade attack on State Police Intelligence Headquarters in Mohali, The Tribune has reported.The kingpin behind the attack has been identified as one Lakhbir Singh Landa, said Punjab Director General Of Police (DGP) V.K. Bhawra, according to NDTV.“He [Landa] is a resident of Tarn Taran. He is a gangster and shifted to Canada in 2017. He is a close associate of Harinder Singh Rinda, who is a terrorist based in Pakistan,” the news channel quoted the DGP as saying.As per the Tribune report, the DGP claimed that the two, Landa and Rinda, work for Babbar Khalsa International, a terror outfit, and Pakistan spy agency Inter-Services Intelligence (ISI).The top cop also said that Landa had made several ransom calls to singers and businessmen in the recent past.Also read: Attack on Punjab Police Building Is the Latest Nail in AAP Govt’s Law and Order CoffinBhawra claimed that the “entire conspiracy” behind the attack had been solved. “All the persons behind the attack have been identified, but the three persons who carried out the attack are yet to be arrested,” Bhawra said, according to the Tribune report.Bhawra said, “The attack was a way to send a message since most of the officers had left office when it took place.”Earlier, Landa’s two associates, Nishan Singh and Charan Singh, were arrested from Tarn Taran by Faridkot Police. According to police, Nishan obtained the rocket-propelled granda from Landa and gave it to other three persons.The RPG was fired at the third floor of the highly-guarded building in Mohali’s Sector 77 at 7:45 pm on Monday, May 9, following which an alert was sounded in Punjab.The rocket launcher used in the attack was located within a radius of 500 metres from the attack site the following day.