Joynal Abedin Khan :The members of law enforcing agencies yet to trace any killer of the Italian citizen Cesare Tavella after passing two days. Police are try to arrest the culprits after analyzing the data and installed CCTVs’ footage.The cop members also have been working for more than 50 hours to identify the killers after admitting the responsibility of the Islamic State (IS).They were interrogating witnesses including beggars to trace the assailants.A joint and separate investigations, including Italian detective branch, have been investigating the murder for two days. But no team still has found fruitful evidence in connection with the incident, policed Headquarter sources said. They suspected that it was not an act of mugging but a pre-planned murder.Police sources said that they were investigating why the street lamps had not been functioning at the time of the murder. A letter was sent on Monday to the Dhaka North City Corporation authorities enquiring about the matter.Dhaka Metropolitan Police (DMP) on Wednesday formed an 11-member committee of Detective Branch (DB) to investigate the murder of Italian aid worker Cesare Tavella in Dhaka, said Muntasirul Islam, DMP Deputy Commissioner (media).Security has been beefed up in and around the capital’s diplomatic enclave – mainly spread across Gulshan and Baridhara from Tuesday morning, following Monday’s killing of an Italian national, he added.Earlier, DMP’s Joint Commissioner Md Monirul Islam was made the head the comining committee, a Police Headquarters statement said on Tuesday.A special meeting led by Acting Inspector General of Police (IGP) Mokhlesur Rahman took the decision.A team of skilled and expert police officials was also formed to help the probe committee, the statement said.Criminal Investigation Department (CID) Special Superintendent Md Rezaul Haider is heading the supporting team.DB was tasked with the case on Tuesday afternoon, Dhaka Metropolitan Police (DMP) Deputy Commissioner Muntasirul Islam said. The DB’s Dhaka city (north) unit would conduct the investigation, he added.Plainclothesmen had been deployed around Tavella’s house, workplace, and the murder site, he added.The Detective Branch of police on Tuesday took over the charge of investigation into the murder of a Dhaka-based Italian aid official in the Gulshan diplomatic zone in the city.Joint Commissioner Monirul Islam, also the DB chief, will now look after the case, as per decision of a high-powered meeting held at the Police Headquarters earlier in the day.An investigation assistance committee was also formed with CID Special Superintendent Md Rezaul Haider. The two officials will choose the other members of the body.Rapid Action Battalion (RAB) will help police to investigate the incident, Benazir Ahmed, Director General (DG) of the elite force told the reporters while he was visiting the spot on Wednesday. RAB also collected CCTV footage from the nearby spots to identify the killers. “But we could not trace their faces from the footage,” the DG sdaid.Meanwhile, Home Minister Asaduzzaman Khan Kamal claimed that the law enforcement agencies had not found any link of international militant group Islamic State (IS) with the murder of Cesare Tavella, the Italian.Addressing a press conference in his office, the minister also claimed that there was no existence of IS in Bangladesh. He hoped that the killers would be traced soon.Although IS has no organisational base in Bangladesh, the law enforcement agencies recently arrested a number of alleged IS recruiters, trainers and members of local banned militant groups and newly formed extremist outfits who are willing to join the outfit based in Syria and Iraq.Even on Monday noon, the visiting CA officials met the home minister to assess security arrangements. Minister Kamal had assured them of providing VVIP security protocol.In a statement issued Monday midnight, the Islamic State (IS) said that a “security detachment” had tracked and killed Tavella with “silenced weapons” in Dhaka, according to the SITE Intelligence Group’s website.Earlier, Tavella, 51, was shot dead by three unidentified assailants who came on a motorcycle near road number 90 of Gulshan 2 around 6:15pm on Monday. The killers fled the scene towards Road No. 83 after one of them shot at Tavella thrice.He was taken to United Hospital by a car driver, Mohammad Bilal, only to be declared dead by the duty doctors around 7pm.Tavella had been working as the project manager of PROOFS (Profitable Opportunities for Food Security) at the Netherlands-based development organisation ICCO Cooperation since May. ICCO Country Representative Hellen Vander Beek filed a case with Gulshan police station around 10:30pm on Monday.