The decision to launch inquiries against the two officials was taken in a meeting of NAB's executive board on June 9.
Earlier today, Shehbaz had excused himself from appearing before NAB for a third time citing health reasons.
According to the bureau, Nawaz had illegally leased land to Mir Shakilur Rehman in 1986.
In statement, watchdog says will undertake “comprehensive, independent” investigation on all aspects of alleged scams.
Arrest made in a case pertaining to the purchase of a 54-kanal land.
SAPM Awan says the government will accept valid demands of film producers as it forms a new film policy.
NAB officials say raids were conducted in search of important evidence in money laundering, benami accounts cases.
Wazir's lawyer says continued incarceration of his client against the law, will move Supreme Court against decision.
Lahore High Court admonishes NAB prosecution for lapses in investigation, questions why supplementary reference filed.
FIR registered against lawyers, including Lahore Bar Association general secretary and vice president.
Orders to remain in place for 15 days, during which NAB will appeal accountability courts to issue confirmation.
PM has asked govt "to ensure that Nawaz Sharif gets the best possible care in accordance with the wishes of his family".
She also meets her father, former premier Nawaz Sharif, at the hospital, sources within NAB say.
Says Nawaz's low platelet count was due to a medicine that thins blood, which his physician had prescribed.
PAT chief says he is not handing over leadership to his sons, transferring power to the party's council.
NAB confirms arrest; says Maryam, Nawaz's nephew Yousuf Abbas will be presented before an accountability court tomorrow.
NAB says Chaudhry's comments tarnish its image and invalidate contributions of its officials.
Former mines and minerals minister arrested over involvement in unlawful award of mining contract to company.
Says the channel that aired the clips has already apologised; calls the entire episode the work of a blackmailing group.
Sarwar says public representatives will be "truly empowered" in the new local bodies system.