The release of thousands of genetically modified mosquito swarms in the U.S. state of Florida began this week as part of efforts to control the species of insects that spread summer diseases.
The "New York Post" reported that the new project, from British biotechnology company Oxitec, was aimed at reducing the spread of mosquitoes that could spread many diseases.
The aim of the project is to genetically modify mosquito males while females remain unaltered, as they will automatically die after vaccination, according to the newspaper.
The so-called "death mechanism" then prevents any offspring of female carriers from surviving.
"Mosquitoes cannot live after vaccinations, so their numbers are controlled in the coming months," Oxytek said in a statement.
Modified mosquitoes will be placed in six locations in Florida, with about 12,0000 expected to appear each week over the next 12 weeks.