Faced with the first domestic outbreak of dengue fever since 1945, the Tokyo Metropolitan Government on Tuesday set up mosquito traps in Yoyogi Park to gauge how many of the insects are carrying the disease.

The traps were placed in 10 locations in the park. They use light and carbon dioxide-releasing dry ice to attract mosquitoes into nets.

The trapped mosquitoes will be collected Wednesday, with the process being repeated once a week for the time being, officials said.