A low intensity blast in a Haryana Roadways bus here left at least eight people injured, police said on Thursday.The injured were rushed to a hospital in Kurukshetra near here for treatment.Police officials said they were investigating if the "low intensity" blast was caused by an Improvised Explosive Device.Some of the window panes of the bus were damaged due to the blast. Fire tenders were rushed to the spot after the incident, the officials said.The bus was proceeding from Delhi to Katra in Jammu and Kashmir.