This resulted in an even larger exodus through the port of Mariel, where an improvised flotilla of Cuban exiles from Miami in small pleasure boats and commercial shrimping vessels brought Cuban citizens who wished to leave the island. Within weeks, 125,000 Cubans reached the United States despite Coast Guard attempts to prevent boats from leaving U.S. waters for Cuba. As the exodus became international news and an embarrassment for the Cuban government, Castro emptied his hospitals and had prison inmates rounded up as "social undesirables", and included them among the other refugees. The Cuban Communist Party staged meetings at the homes of those known to be leaving the country. People were intimidated by these "repudiation meetings" (mitines de repudio), where the participants screamed obscenities and defiled the facades of the homes, throwing eggs and garbage, for hours. Labeled as "traitors to the revolution" those who declared their wish to leave became the targeted victims of the attacks, their rationing cards were taken from them, their jobs were terminated, or they were expelled from schools or universities. Towards the end of the crisis, the repudiation meetings were ended. The scale of the exodus created political difficulties for the Cuban government, and an agreement was reached to end the boatlift after several months. Out of more than 125,000 refugees, a number from as low as 7,500 to as high as 40,000 were believed to have criminal records in Cuba, though many of their crimes would not qualify as crimes under U.S. law. Some 1,774 of the refugees were classified as serious or violent criminals under U.S. law and denied citizenship on that basis. The majority of refugees were young adult males, 20 to 34 years of age, from the working class: skilled craftsmen, semi-skilled tradesmen, and unskilled laborers.