Police said the three IEDs exploded at a place 3 km away from Kangpokpi town when the Border Security Force personnel were trying to board a vehicle.
After the explosion, Manipur police and BSF officials rushed to the spot and conducted search operation but no one was arrested, police said.
The injured were given first aid by Assam Rifles doctors at Kangpokpi and referred to a hospital here.
No organisation or individual has claimed responsibility for the bomb attack so far.
In another incident, an IED weighing 3 kg was recovered by a combined team of Manipur Police and 25 Assam Rifles early today while frisking passengers and checking bus near Tendongyan village in Manipur's Imphal West district, said Th. Vikramjit, Additional Superintendent of Police.