A spokeswoman for Pakistan's former president, Pervez Musharraf, says he has been rushed to hospital in the port city of Karachi after suffering chest pain and breathing problems.
Aasia Ishaq says that Musharraf is being treated in an intensive care unit having been taken to hospital by family members Thursday. She said that doctors are undertaking medical tests.
Ishaq declined to share any further details.
Musharraf took power in a 1999 coup and served as president until 2008, when he was forced to step down as his popularity plummeted and he was threatened with impeachment.
In recent years, Musharraf has been on trial for high treason over his suspension of Pakistan's constitution in 2007 and his detention of a number of judges.