After Pentagon confirmed that following an airstrike on the directions from President Donald Trump, Iranian General Qassem Soleimani had been killed near the Baghdad airport in Iraq, #worldwar3 trended with 52.7K tweets.
#WWIII also trended as Iran talked of "harsh retaliation".
One user posted a meme of a woman gagging her mouth and wrote: "Me after seeing 'WorldWar3', 'WorldWarIII', 'Before WW3' and 'Iran' trending when I've been saying 2020 gonna be MY year. #WWIII #WW3 #worldwar3."
One Twitter user posted a picture of a man lost in deep thought and wrote: "Checking if it's safe to be in Japan when WWIII starts; or I should go to Ghana: #worldwar3."
A user posted a meme of a man lounging on a sofa and munching on popcorns perfunctorily. He commented: "Everyone chilling in Ireland watching World War 3 start. #worldwar3."
A user posted a picture of climate activist Greta Thunberg in a pensive mood and wrote: "When you are appealing to save the earth and see #worldwar3 trending."
Another post had a meme of Trump making faces, with accompanying caption reading: "Trump: 2020 is going to be my year."
One Twitter user posted a picture of a merry Kim Jong-un along with North Korean Generals and wrote: "Kim Jong-un after seeing WorldWar3 trending...."
( With inputs from IANS )