ZURICH - Lufthansa officially announced it will take over unprofitable Swiss International Air Lines for 310 million euros (US$409 million). Lufthansa will be paying about three-quarters of the money to major shareholders in the Swiss carrier, while the remaining sum will be paid to individual investors. The Swiss government holds a 20 percent stake in the Swiss airline. Combining the airlines will bring extra revenue and cost savings amounting to about 160 million a year starting in 2007, the companies were quoted saying. The agreement ends weeks of speculation that Lufthansa would take over its Swiss rival. The purchase, the second merger of two European national carriers in a year, will add intercontinental destinations to Lufthansa's network as Ryanair, EasyJet and other low-fare airlines grab market share in Europe, reports said. Swiss International was set up in 2002 from the remains of bankrupt, 70-year-old Swissair Group under a government-led rescue after the carrier, once Europe's seventh-largest, collapsed after the September 11 terrorist attacks.