TheNation Monitoring WASHINGTON UN investigators have identified a previously unknown complex in Syria that bolsters suspicions that the Syrian government worked with AQ Khan, the father of Pakistans atomic bomb, to acquire technology that could make nuclear arms. The buildings in northwest Syria closely match the design of a uranium enrichment plant provided to Libya when Muammar Gadhafi was trying to build nuclear weapons under Khans guidance, officials told an American news agency The UNs International Atomic Energy Agency also has obtained correspondence between Khan and a Syrian government official, Muhidin Issa, who proposed scientific cooperation and a visit to Khans laboratories following Pakistans successful nuclear test in 1998. The complex, in the city of Al-Hasakah, now appears to be a cotton-spinning plant, and investigators have found no sign that it was ever used for nuclear production. But given that Israeli warplanes destroyed a suspected plutonium production reactor in Syria in 2007, the unlikely coincidence in design suggests Syria may have been pursuing two routes to an atomic bomb: uranium as well as plutonium. The Syrian government did not respond to a request for comment. It has repeatedly denied pursuing nuclear weapons but also has stymied an investigation into the site bombed by Israel. It has not responded to an IAEA request to visit the Al-Hasakah complex, the officials said.