Akhir 26, 1432, March 31, 2011, SPA-- A parcel bomb exploded on Thursday in northern Switzerland at a building belonging to UBS bank, injuring two people. According to dpa, the explosion occurred just after 8am (0600 GMT) in the city of Olten, in the canton of Solothurn, according to the news website 20 Minuten. Cantonal police said there was no immediate claim of responsibility. The injured people face no direct threat to their lives, but further information on their condition was not immediately available.