An ardent proposal of marriage by a 29- year-old suitor triggered an unidentified-flying-object (UFO) alert, police in the south-eastern German town of Straubing said Thursday, according to dpa. As he asked his 27-year-old girlfriend, on the bank of the Isar river to marry him, he released into the air 50 tiny hot-air balloons made of paper, with little candles burning under them. Several shocked residents phoned police Wednesday night to report strange lights in the sky. Police who tracked down the couple enjoying the magic sight together reported that she accepted. They are to marry this autumn.