Dhaka, Dec. 4 -- Imran Khan, Pakistan's jailed former prime minister, is in good physical health but facing isolation and psychological strain, his sister said on Tuesday, after a rare supervised visit following weeks in which his family said access had been blocked.

Uzma Khanum, one of Khan's three sisters, was the only family member permitted to meet him in Adiala Jail, where supporters of his Pakistan Tehreek-e-Insaf (PTI) party had gathered outside to protest against conditions of his detention.

She told reporters her brother "looked healthy" but had been confined indoors for long periods with no communication with relatives or aides.

"He is physically well," said Khanum, who is a doctor. "But he is kept inside all the time and onl...