TEHERAN - Iranian police said on Saturday they had arrested 32 university students at a party in Karaj outside Teheran for drinking alcohol and “being half-naked,” the ISNA news agency reported. “Police forces arrested 11 girls and 21 boys on Thursday night for drinking alcoholic drinks and being half-naked,” the commander of Teheran province’s security police Nader Sarkari was quoted as saying.He said the raid came after a tip-off and that the students were celebrating after one of them had won a medal in an international competition.