Islamabad, Pakistan (CNN) Former Pakistan Prime Minister Nawaz Sharif has been sentenced to 10 years in prison and handed an £8 million ($10.5 million) fine over corruption charges related to his family's purchase of overseas properties, dealing a blow to his party's prospects ahead of a general election later this month.

His daughter Mariam Nawaz, widely seen as Sharif's anointed political heir, was also found guilty and is facing seven years in prison and a £2 million ($2.6 million) fine. Her husband Captain Safdar has received a one-year jail sentence.

Judge Mohammad Bashir handed down the sentences in a court in Islamabad Friday. None of the defendants were present for the verdict -- Sharif and his daughter are currently in London with Sharif's wife, who is receiving cancer treatment, and Safdar is in Pakistan but was reportedly unable to attend.

All three have been barred from engaging in politics for 10 years and four properties in London will be confiscated by the Pakistani state, according to the verdict. They have 10 days to appeal the verdict at the Islamabad High Court.

Sharif's brother, Shahbaz Sharif, who inherited the leadership of the Pakistan Muslim League-N (PMLN) last year, said in a statement that the party "strongly rejects the verdict."

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