One person was killed in seven blasts that rocked Bengaluru and its outskirts on Friday afternoon. While four low-intensity blasts went off at Nayandahalli, Madivala, Adugodi areas on the outskirts, blasts also rocked the tony areas near Mallya Hospital, Langford Road and Richmond Circle in Bengaluru city. Two blasts were reported in Madivala.

The crude bombs, concealed near refugee camps and the roadside, stuffed with nuts and bolts, exploded during the busy lunch hour at Adugodi, Madivala, Nayandahalli, Pantharapalya and Vittal Mallya Road. Adigoda and Madivala have a thick concentration of IT professionals.

One woman was killed and fourl injured in the serial blasts which took place within a span of 15 minutes from 1:30 pm, Bengaluru Police Commissioner Shankar Bidari told reporters.The woman, who was waiting at a bus shelter in Madivala on the Bengaluru-Hosur road, was killed in the blast and her husband and another person were seriously injured.

Bidari said among the injured, the condition of one was stated to be serious.The first blast took place at Madiwala check post, which incidentally is behind the famous Forum Mall, one of the leading shopping destinations in Bengaluru. The second and third blasts took place at Nayandahalli and Adugodi, both on the outskirts of the city.

The injured have been admitted to the St Johns Hospital in Bengaluru.Police sources said all the bombs had timer devices that were trigerred by mobile phones.The police also said the intention is to scare, not kill."In all the blasts, low intensity time devices were used. They want to cause damage to human lives. Explosives were used in quantity equal to one to two grenades," he said.

While no one has claimed responsibility so far for the blasts, sources in the Union Home Ministry suspected Pakistan-based Lashker-e-Tayiba along with the local support of the Students Islamic Movement of India to be behind the attacks.Bengaluru was rocked by a major terrorist attack in December 2005, when extremists opened fire in the famous Indian Institute of Science complex in which a Delhi IIT professor lost his life.

Bidari termed the blasts as an "act of miscreants" trying to disturb peace in Bengaluru. The blasts appeared pre-planned, he said. Bidari added that timer devices and explosives were used in the explosions. He has asked people not to panic and go about their normal activities.

Mobile phone networks in the city have been jammed.Bomb disposal squads and forensic experts have rushed to the spot for investigations.In Delhi, Union Home Secretary Madhukar Gupta spoke to the state chief secretary and sought a detailed report about the incident.