OEIRAS, Portugal, April 28 (Xinhua) -- Portugal is using drones with loudspeakers to warn people to stay at home during an awareness-raising operation to prevent the spread of the COVID-19.
A drone with a loudspeaker warning people to stay at home is seen flying during an awareness-raising operation to prevent the spread of the COVID-19 in Oeiras, Portugal on April 26, 2020. (Photo by Pedro Fiuza/Xinhua)
A drone with a loudspeaker warning people to stay at home is seen flying in the sky during an awareness-raising operation to prevent the spread of the COVID-19 in Oeiras, Portugal. (Photo by Pedro Fiuza/Xinhua)
A drone with a loudspeaker warning people to stay at home is seen flying during an awareness-raising operation to prevent the spread of the COVID-19 in Oeiras, Portugal. (Photo by Pedro Fiuza/Xinhua)
A firefighter controls a drone with a loudspeaker warning people to stay at home during an awareness-raising operation to prevent the spread of the COVID-19 in Oeiras, Portugal. (Photo by Pedro Fiuza/Xinhua)■
