Imphal, Jan 23 : Twin blasts at the heart of the city sent shockwaves ahead ofthe Republic day here today.Two IEDs blasted at the same time at RIMS road around 0500 hours. However,no one was injured.The sound could be heard till a long distance as the IEDs were powerful.Many shops near the road were badly damaged. Imphal West police personnelrushed in and cordoned off the area.Massive combing operations had been carried out in view of the Republic daycelebrations. Police has been regularly calling out people at various places tocheck their identities.A high alert was sounded and security was beefed up. Many vehicles were alsostopped and checked.People were frisked and police assigned duties at various locations.Police also announced new traffic regulations near the route of the Republic dayparade.