SUICIDE PACT MAY BE JEWISH PLAN HAVANA, Cuba, May 31. Capt. Gustav Shroeder of the German liner Saint Luis, informed authorities today he feared a "collective suicide pact" among his 917 German Jewish refugee passengers, who are scheduled to sail back to Hamburg with him tomorrow after being denied entry to Cuba. He reported there was a "state of mutiny" aboard which he could not control and therefore he feared "open mutiny" when the ship left Havana harbor. The captain made his statement after Capt. Juan Estevez Maymir, chief aide of President Laredo Bru, had spent several hours aboard the ship investigating reports that hundreds of the refugees, denied admittance to Cuba, were threatening to take their lives if the ship sailed back to Germany. Twenty-five police were sent aboard the liner to guard others from any attempted self-destruction after Max Loewe, one of the refu-slashed his wrists and jumped overboard yesterday. He was res-1 cuei and is recovering. The refugees were reiusea pei-mission to disembark when they were unable to show Cuban consular visas, passports or Cuban labor department permits. They had only provisional permits of the immigration department to land as passengers en route to the United States where they hoped to gain admission later.