You have offered him the laptop and the cell phone, which means you had legally completed the induction process, and the employee had willingly signed in. Assuming that there is enough signing-off that had happened, please be prepared with those documents as proof to claim the equipment back. Please act as early as possible. You have to send him three letters, the first being the notification of him not reporting and the consequences of it. Clearly mention the time within which he needs to respond, such as 24 hours to 3 days.
If no intimation is received, please initiate the next level, notifying him that no intimation from him will lead to a temporary pause in his employment. The third would be sent to him at the end of 21 days, notifying him that his employment would be terminated, and if he doesn't hand over the office equipment including the laptop and the phone, an FIR would be lodged.
On the contrary, have you checked his conditions in person? Would anyone from your team or his team check what he is going through? Please investigate well to ensure a just procedure with him. It shouldn't be the case that he is going through real trouble and gets axed from his job too.
Wish you all the best!