Passage: The raids had mixed results. While significant damage was inflicted on Singapore's important naval base and commercial port, some raids on these targets were not successful and other attacks on oil storage facilities on islands near Singapore were ineffective. The minelaying campaign disrupted Japanese shipping in the Singapore area and resulted in the loss of three vessels and damage to a further ten, but was not decisive. The Allied air attacks were successful in raising the morale of Singapore's civilian population, who believed that the raids marked the impending liberation of the city. The overall number of civilian casualties from the bombings was low, though civilian workers were killed during attacks on military facilities; one attack rendered hundreds of people homeless.

Question: What did the campaign interupt?
Japanese shipping