The website was allegedly hacked around the same time the admit cards of the Mains exams were supposed to be released.
"The website is under maintenance," a message read when the UPSC website was accessed on Tuesday morning. The website was restored on Tuesday morning.
There has been no official word on the hacking of UPSC website so far.
Here's how the Twitterati are posting their reactions on the social media platform.
Earlier this year, the official website of Jamia Millia Islamia University was allegedly hacked.
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