When Zayn Malik announced that he'll be leaving the One Direction band, fans started to express not only their sadness but their disappointment as well.

However, while he insisted that there's no bad blood between him and his former bandmates, a series of Tweet blasting was fired recently.

"My band has been really supportive. They've been cool about it," he said. "And they understand that, you know, it's not real to me anymore," he previously said in an interview with The Sun.

Being cool is certainly not what's happening between Zayn Malik and Louis Tomlinson right now. Apparently, the two are engaged in a Twitter feud, which started out from a comment Tomlinson made to Naught Boy's studio photo of him and Malik.

"Jesus forgot you were such an in demand producer .... How does it feel to be riding on the back of someone else's career?" Louis Tomlinson tweeted @NaughtyBoyMusic.

Zayn, who reportedly remained quiet about the ongoing feud between Naughty Boy and Louis has finally chosen to join the war as he told Louis in a tweet, "remember when you had a life and stopped making bitchy comments about mine?"

Louis, who is supposed to be really good friends with Zayn Malik, answered back through a cryptic post saying,

"Remember when you were 12 and you used to think those Mac filters for your pictures were cool haha ! Some people still do HA!" Louis tweeted.

While Louis Tomlinson did not mention any names, many immediately assume that he was pertaining to the photo that Naughty Boy previously posted, thus the record producer quickly defended himself by blasting the One Direction member and questioned his ability to sing.

"And some people can't even sing.. but who's complaining when there's auto tune eh," he tweeted Louis.

Zayn Malik on the other hand, remained mum again after the one time comment he made to his former One Direction band mate.