Authorities searched for clues about who kidnapped an American in Pakistan but came up with no leads after questioning the guards at his house when he was abducted, police said Sunday, according to AP. Gunmen snatched development expert Warren Weinstein, 70, before dawn Saturday after tricking his guards and breaking into his house in the eastern city of Lahore, a brazen raid that heightened fears among aid workers, diplomats and other foreigners already worried about Islamic militancy and anti-U.S. sentiment in Pakistan. Weinstein is the country director for J.E. Austin Associates, a development contractor that has received millions of dollars from the aid arm of the U.S. government, according to a profile on LinkedIn, a networking website. He had told his staff that he would be wrapping up his latest project and moving out of Pakistan by Monday, just a couple days after he was kidnapped. Police were hoping the guards could shed some light on who targeted Weinstein but came up empty-handed, said Shoaib Khurram, a senior police official in Lahore. "We do not yet have any concrete information that there was a specific threat," Khurram told The Associated Press. Kidnappings for ransom are common in Pakistan, with foreigners being occasional targets. Criminal gangs are suspected in most abductions, but Islamic militants are also believed to use the tactic to raise money. J.E. Austin Associates stressed Weinstein's commitment to Pakistan's economic development in a written statement and said he has worked with a wide range of Pakistani government agencies, including the Pakistan Furniture Development Company and the Pakistan Dairy Development Company. "His efforts to help make Pakistani industries more competitive have resulted in many hundreds of well-paying jobs for Pakistani citizens and contributed to raising the standard of living in the communities where these businesses are located," it said. -- SPA