Karachi, Pakistan (CNN) Former Pakistani Prime Minister Nawaz Sharif has been found guilty of fresh corruption charges and sentenced to seven years in prison, a court ruled in Islamabad on Monday.

An accountability court sentenced Sharif to seven years in detention and fined him $25 million.

Sharif was found guilty of corruption charges relating to the purchase of Al-Azizia Steel Mills where prosecutors alleged that the Sharif family misappropriated government funds to buy the mills. The company was used by the Sharif's family to launder money, evade tax and hide offshore assets.

Sharif was immediately arrested and taken into custody by courtroom officials.

Meanwhile, supporters of the former prime minister held small protests outside the courtroom in Islamabad -- which tear gas was used to disperse them.

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