Thousands of insects hovered under a light at a villager's house in Hung Yen in Vietnam. The villager said thousands of insects flew into his house to gather around the lights and pillars recently. He tried to use an insecticide spray to drive them off but it only reduced the number a little, and the insects quickly returned in larger numbers. The insects reportedly attacked people who come close to them. Local residents are now forced to close their doors before it gets dark to prevent insects from entering their houses. The insects are known to be living on the ground and fly to higher places or into houses to avoid flooding.