Malaysian Prime Minister Tun Dr Mahathir Mohammad has resigned, The Malaysian Insight tweeted.

A short press statement has also been shared on the prime minister's official Twitter. 
 

Kenyataan Akhbar : Peletakan Jawatan sebagai Perdana Menteri Malaysia pic.twitter.com/naW2MajfsG

Now, it is up to the Yang di-Pertuan Agong, Al-Sultan Abdullah Ri'ayatuddin Al-Mustafa Billah Shah, to accept or reject the resignation.