SRINAGAR - Claims about increased infiltration, especially from Uri sector in North Kashmir, are being contested by J&K Police, prompting Indian Army to reassess the figures and workout a mechanism for providing more authentic information.The recent figures of about 100 militants having slipped into the Kashmir Valley this year seems to be an exaggerated figure, highly placed sources in the state home department said.Immediately after the conference of Directors General of Police in New Delhi, earlier this month, state police and home department flagged the issue and sought clarification about the number of militants who may have crossed over official sources were quoted by media in Srinagar. The input provided by Director General of Military Intelligence and Defence Intelligence Agency about infiltration of nearly 24 militants from Uri sector in the month of July could not be substantiated either by the local army unit or state police, the sources said.Extensive search was launched in nearby areas which later extended to Hafruda forests in frontier district of Kupwara, the sources said, adding that Unmanned Aerial Vehicles (UAV) were pressed into service to ascertain the inputs but there was no corroboration of the input.Local Army commanders held series of meetings with police after there were no tell-tale signs of any militant groups infiltrating into the Valley from Uri sector in a big way prompting a senior state police official to comment in one such meeting that either "the militants have vanished into thin air or that ghosts only crossed the Line of Control."The J&K Police held series of meetings with local Army, Intelligence Bureau and other security agencies over the likely inflated number of infiltration, the sources said, adding that it was decided in-principle to work out a mechanism for more authentic information to ascertain the magnitude of infiltration. Sopore, popularly known as apple-town, in North Kashmir has also been screened thoroughly by the state police and security agencies but no such activity has come to notice, the sources said.Separately, Indian police have launched crackdown on youth allegedly involved in "stone-pelting" during recent protests that erupted across the Kashmir valley following the blasphemous film made in US. According to sources, police are using video footage and photographs taken by undercover cops for arresting the youth. Police have so far arrested seven youth and are hunting for 17 more. "We have arrested seven youth and are looking for 17 others," a top police official in Srinagar said. "We are actively hunting for them. Hopefully we will arrest them in a day or two."