ISLAMABAD, Pakistan — The opposition leader in the Pakistani parliament, who is also the younger brother of former Prime Minister Nawaz Sharif, was arrested on Friday by anticorruption authorities, officials said.

Muhammad Shehbaz Sharif, the leader of Pakistan Muslim League-Nawaz, was arrested by officials of the National Accountability Bureau in the eastern city of Lahore and will appear in court on Saturday, officials said. He is accused of corruption in a low-cost housing scheme that was introduced in Punjab during his time as chief minister in the province.

The arrest is the latest setback for the Sharif family, which has been dogged by allegations of widespread graft and malfeasance. This year, Nawaz Sharif and his daughter, Maryam Nawaz Sharif, were arrested and sent to prison over corruption-related charges. They were released on bail last month after a high court suspended their sentences.

Muhammad Shehbaz Sharif was made the standard-bearer of the Pakistan Muslim League-Nawaz by his elder brother in July 2017, and he was officially elected party leader in March. The courts have disqualified Nawaz Sharif from heading a political party or holding public office.