The statements were also published through Qatari official news agency QENA and included criticism from the Emir toward Egypt, the UAE, and Bahrain.
According to the statements, Al Thani also considered that it is unwise to confront Iran, adding that some neighboring countries have ambitions in Qatar.
In addition, the hacked Twitter account contained a false story in Arabic apparently from the country's foreign minister, Mohammed bin Abdulrahman Al Thani, about Qatar withdrawing its ambassadors from several nearby countries.
On Tuesday night, a story published by the Qatar News Agency said Sheikh Tamim Bin Hamad Al Thani, the country's emir, had addressed a military graduation ceremony that day in which he criticised the aggressive rhetoric aimed at Iran by the Gulf and USA during president Donald Trump's trip to Riyadh.
"The state of Qatar has been surprised by the actions of certain media outlets and satellite channels", the Foreign Ministry said in a Wednesday statement.
Shortly after the hack attack and the spread of the fake news report, the UAE announced that it was banning Emiratis from accessing Al Jazeera's website.
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The Doha-based media network has maintained that it is an independent news service giving a voice to everyone in the region.
It was also reported on Tuesday that the Qatari Emir, Sheikh Tamim bin Hamad Al-Thani, had said that Doha has "tensions" with the Trump administration, and acknowledged that Iran is an "Islamic power".
Among the issues allegedly addressed by the Qatari ruler in the statement were the Palestinian-Israeli conflict, strategic relations with Iran, and comments about Hamas.
"The statement published has no basis whatsoever and the competent authorities in the state of Qatar will hold all those [who] committed [this] accountable", he said. The government later called the state TV footage "fake videos".
Qatar, however, has been targeted by hackers before. In May 2016, hackers leaked sensitive information involving thousands of Qatar National Bank customers, purportedly including government employees and members of the ruling family.
Meanwhile, numerous Saudi media outlets claimed that a number of Qatari news websites have been banned in Saudi Arabia and the UAE as a response to the statements.
Qatar has been at odds with Gulf states for sometime over the extent of its support for the Muslim Brotherhood, an issue that has been brought into sharper relief by Trump's demand for Gulf states to do more to fight extremism.