China's environmental watch-dog found 484 violations by 177 companies in the first three days of a monthlong campaign targeting pollution caused by processing imported waste.

The Ministry of Environmental Protection said on Monday that 60 teams with a total of 420 inspectors found these violations on July 4 to 6.

The inspectors had three days of training after the campaign was launched on July 1. Inspectors have suggested placing the violations on file for investigation and prosecution.