KARACHI - Law enforcement agencies are unable to chalk out a foolproof strategy to monitor the displaced people arriving in the metropolis, well-informed sources confided to The Nation on Wednesday. Intelligence agencies have expressed grave concern over the settlement of the displaced families in Karachi fearing that militants might also arrive in the guise of displaced people. Following the reports, Sindh police made efforts to monitor the IDPs from tribal areas but due to limited resources, police high ups were unable to chalk out a foolproof strategy in this regard. It has been learnt that people from various areas of NWFP have been arriving in the city on daily basis for last couple of months but recent military operation in Swat and other areas accelerated their migration. On the average, 25 to 30 buses are arriving daily in the city from NWFP and each of these vehicles has a capacity of 72 passengers. But each of them is carrying about more then 100 passengers. Sources further said that some 188 displaced families have arrived and settled in different areas of Gadap Town in the first week of Swat operation. The displacement of these people had already doubled the population in Gadap Town where thousands. The areas where mostly displaced families are getting shelter include Mangopir, Pahar Ganj, Janjar Goth, Chaniser Goth, Sinkander Goth, Yasrab Goth, Yasrab Colony, Pakhtoonabad, Machar Colony, Sohrab Goth, Taiser Town, Surjani Town, Kati Pahari and others. Source said that authorities concerned have ordered strict monitoring of the immigrant families and collection of precise data in this regard. However, it is not easy to collect all necessary details about the IDPs living in these areas due to limited resources. There is no doubt that militants and extremists belonging to different religious outfits could also enter the metropolis under the cover of displaced families, the source said. A large number of militants arrested in recent months hailed from troubled areas of NWFP and they had arrived in the city in the guise of displaced families. Hundreds of displaced families from Bajur, Swat, Waziristan and other areas of NWFP had already arrived in the city in last few years. A senior police official told The Nation that rising migration would enhance street crimes in Karachi because criminals could easily find refuge here as IDPs. He added that only a small number of IDPs could be accommodated by providing jobs but it was impossible to support thousands of families. Under these circumstances, the unemployed people could involve themselves in criminal activities. He said it would be very difficult for the law enforcement agencies to handle such criminal elements as the crime rate was already on the rise in the areas where displaced people were getting shelter. Moreover, the massive influx of the IDPs in Karachi would cause ethnic violence. Many among the displaced people are getting shelter in the houses of their relatives. However, a significant number is also grabbing lands in various areas and constructing their houses that could also result in ethnic violence in the future.