Unknown miscreants placed a hand grenade at the residence of one Sougrakpam Rajesh Singh (age about 47 years) son of S. Lokeshwor Singh at Uripok Huidrom Leikai in Imphal West. The grenade was found lying beneath an I – 10 car parked at his gate early morning today. Rajesh is stated to be an agent of SK-Oil and is also running a Plastic bottle industry at Takyel. A team of Manipur police safely retrieved the grenade at around 8 am today morning.