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Karachiites on Monday witnessed swarms of locusts descending upon their city.
Known as Tiddi Dal in Pakistan, the insects were seen filling the skies in different parts of the city.
Citizens were posting videos and photos of the insects on social media websites, wondering what has led to the Tiddi Dal assault on Karachi.
Muhammad Tariq Khan, a Met Office official, said the insects, which are found in deserts, are not harmful.