Switzerland has extended restrictions on Bulgarians and Romanians wanting to work in the prosperous nation. The Swiss government says it will continue to impose limits on the number of nationals from the two Eastern European countries who can obtain temporary or permanent residency permits. The restrictions will now last until May 31, 2014, and affect jobseekers wanting to work in the construction, cleaning, security or landscaping sectors. The strong Swiss franc and high demand for labor has made Switzerland an attractive destination for citizens of other European countries. Switzerland’s jobless rate stood at 3.4 percent in March.