Begum Kulsoom Nawaz, wife of ousted prime minister Nawaz Sharif, has been shifted to intensive care unit (ICU) of a London hospital after her condition furtherdeteriorated late, reported private channel Thursday.

According to media sources, The wife of former PM collapsed in the ICU after a cardiac arrest, and has not since regained consciousness.

She has been kept on ventilator, life-support machine and emergency medicine and emergency medicine.

The sources further said that she was being kept under intensive care and her condition was being closely monitored.

Earlier, Nawaz and his daughter Maryam arrived in London to visit ailing Begum Kulsoom.

Maryam, in a tweet, requested prayers for her mother's health.