New Delhi: Delhi Police are learnt to have detained a man in Mumbai in connection with the heist reported from the house of a liquor businessman in the Golf Links area of central Delhi last week.A team conducted raids in Varsova and other areas of Mumbai after the suspect, nicknamed Guddu, contacted an informer in northwest Delhi, sources said.The police were tightlipped and didn’t confirm if the detained suspect was directly involved or was an associate. A source, however, said that the man gave crucial information about the accused involved in the crime and over 100 policemen were conducting raids to nab them. The police are likely to get a breakthrough by Monday.“The Tughlaq Road police was informed on Saturday that a robber named Guddu Kamat could be involved in this case,” a senior officer said. He and his gang had committed a similar heist in Noida last year where they held a woman hostage in her home in sector 61 and looted cash and jewellery worth over Rs 50 lakh. In that case too, one of the accused had joined the household as a cook three days before the crime and helped others enter.Delhi and Noida police had arrested Kamat along with his aides, Amit Kumar Rawat, Rahul and Raman Kamar, all from Bihar. Police now suspect the same gang was involved in this crime too.Kamat, sources said, was a veteran and involved in three hostage-robbery cases in Naraina, Amar Colony and southeast Delhi in 2015. Two teams have gone to his hometown in Supaul, Bihar, to ascertain his whereabouts and whether he and others were out on bail.The police chief asked the area DCP and special CP to improve law and order and step up patrolling. PCR units have also been asked to stay visible.