Landlords and tenants have tried to steal at least $6 million from Maine’s massive COVID-19 rent relief program since it started distributing the rental assistance more than a year ago, according to reports from the agency that runs the program. The Maine State Housing Authority has detected 408 fraudulent applications that would have cost just under $6.4 million since the state’s $350 million Emergency Rental Assistance program started in March 2021. The $6.4 million represents more than 3 percent of the $197.3 million in rent relief MaineHousing has issued, and the 408 fraudulent applications make up less than 1 percent of the more than 49,000 applications the agency has received for rental assistance. But the amounts show that the rent relief program, like other federal COVID-19 relief programs, has been a target of fraudsters who have tried to benefit from billions of dollars in government aid.