Imphal, Aug 22 - A grenade attack outside a hospital in the restive northeastern state of Manipur that wounded five people Friday was carried out by a paramilitary trooper lured by just Rs.5,000 offered by separatists, officials said Saturday.

A police spokesperson said rifleman T. Munal of the India Reserve Battalion (IRB) lobbed the grenade outside a hospital here.

'Locals with the help of our commandos captured the IRB rifleman spotted by witnesses while lobbing the grenade. During investigations, the IRB trooper confessed to having carried out the attack,' L. Kailun, police chief of Imphal, told journalists.

Two of the five injured were in critical condition.

A rifleman of the 2nd IRB based in Imphal, Munal confessed to carrying out the attack on behalf of the Kangleipak Communist Party (KCP), a rebel group fighting for an independent homeland for the majority Metei community in Manipur.

'The IRB rifleman said he got Rs.5,000 to carry out the grenade attack,' the police official said.

'We need to find out if the trooper carried out the grenade attack just for money or if he has definite terror links.