Slovenian police have detained 20 suspects in a nation-wide operation against drug traffickers, official sources said here on Wednesday. More than 150 police have been mobilized for the contingency operations that include house searches in and around the capital of Ljubljana, and Maribor, the second largest city in the country. The latest anti-drug raid followed a recent crack-down on a ring of drug dealers involved in an international criminal gang smuggling drugs to Slovenia and other European countries. At least 12 drug traffickers were arrested, and more than one million euro (1.3 million U.S. dollars) worth of illicit drugs were seized in October, police said.