NEW DELHI, June 28: Preliminary reports indicate that the bomb which exploded last night near a South Delhi club was similar to the one used in the series of bomb blasts last year and early this year which rocked Delhi.Although the results of forensic tests on fragments of the bomb recovered from the site are awaited, police officials say that the samples recovered indicate materials quite similar to those used in the earlier series of blasts.``Investigations at the site indicate that the substances like Potassium Chlorate, Ammonium Nitrate and Sulphuric Acid were used in the bomb, though this has yet to be confirmed,''said Joint Commissioner of Police (Southern Range), Amod Kanth. These are the same substances that were used in the construction of the so-called `crude' bombs used in a number of bomb blasts which rocked Delhi till about six months ago. The bomb is being described as a `low intensity' device. A few iron nails were also found at the scene.And while most of the accused in those cases have been nabbed, those responsible for the last explosion at ITO early this year in January are yet to be arrested.But Amod Kanth refused to speculate on whether last night's blast could be the handiwork of terrorists. ``It is too early to say whether terrorists are involved. But we are looking at this case from every angle.''Police officials say that the bomb was in a dark coloured bag and had been placed near the boundary wall of the Summerfields School which is very near the club in Kailash Colony. Eyewitnesses have reportedly told the police that two men arrived in a white gypsy with `Police' written on it near the club where they got down and placed the bag at the boundary wall. At least one of the men is being described as 5 feet 7 inches, with a beard and aged about forty to forty five years of age.Two security guards who had been injured in yesterday's blast gave their statements to the police this afternoon. One of them Lalan Yadav who saw the bag being placed reportedly told the police that it first caught fire and then exploded. The blast caused extensive damage to two Maruti cars parked nearby. The car which sustained the most damage belonged to a businessman from C.R. Park - S. Mukherjee. Another possibility that police were looking at was that he or other persons whose cars were also damaged could have been specifically targeted due to a personal enmity of some kind.However, this does not seem to be the case now. ``We had spoken to Mukherjee but he has not indicated that there could be anyone with a grudge against him who might want to do this,'' said Kanth.Police have also not yet been able to trace the gypsy with the `Police' markings which was used by the miscreants.