Customs officers at a London airport yesterday found 500,000 pounds worth of drugs which were being smuggled ( 走私 ) into Britain in boxes marked “Urgent Medical Supplies.” The 1 might have suspected for some time 2 drugs were being brought into the country in this way. The 3 is believed to be the work of a 4 international group. Four men were arrested at 5 airport and help for questioning, 6 it is unlikely that they are the organizers. In 7 they declared that they were 8 of what the boxes contained and 9 acted in good faith in bringing 10 into Britain . This is the third time 11 six months that attempts have been made to smuggle 12 goods through Customs by declaring them to 13 medical supplies. They are frequently 14 in special containers and a 15 is given that they may be 16 if they are not handled with care. “ 17 are determined to put a 18 to this practice,” said one of the Customs officers today. “ 19 is no way these people are going to get away 20 this any longer. We have the full co-operation of the international police who are as anxious as we are to track down the main source of supply.”