Former Prime Minister Nawaz Sharif's son-in-law Muhammad Safdar, who has been accused of graft, was arrested early on Monday upon his return to the country from the US.
The court asked whether Nawaz Sharif should be given exemption for 15 days over which NAB prosecutor appealed to issue his non-bailable arrest warrant for not attending the hearing despite assurance.
The NAB authorities had to seek help of the Islamabad police when the charged workers of the ruling Pakistan Muslim League-N lay down in front of the NAB vehicle carrying Capt Safdar.
Hussain and Hassan left for London to be with their mother, Kulsoom, who is battling throat cancer.
Referring to Pakistan Tehreek-e-Insaf chief Imran Khan, who has refused to appear in several cases, Maryam said the "absconders are free and hold public meetings".
The court also ordered to start the process of declaring Sharif's sons - Husain and Hasan - proclaimed offender as they have failed to appear before it so far.
Pakistan vs Sri Lanka, 2nd Test, Day 3 at Dubai
Sarfraz felt that this being his first outing as captain of the Test team, it was important that he had learnt a fair bit. Last night, it was a little hard to bowl, especially with the dew (but) we knew when we come today, it will grip more.
The NAB said that since there has been no extradition treaty between Pakistan and the UK, Sharif's sons may not be brought back here to face the three corruption and money laundering cases against them.
Both separately appeared in the court of Judge Muhammad Bashir.
The body also froze the bank accounts and seized properties of the Sharif family. Maryam Nawaz while speaking to media said, "My brothers live overseas and the laws of Pakistan do not apply to them", she said. "I do not need to say anything here, the way things have been going on over the past year and a half has revealed the truth to the nation", a leading news channel quoted her as saying.
"Alhamdulillah, she is better today, however, the treatment continues", he said, requesting people to pray for her recovery. Maryam and Safdar were granted bail yesterday in the Panama Papers case. Questions will be raised when the Panama case ends in "iqama" (foreign work permit).
The NAB has also written to the interior ministry to get Hassan and Hussain's red warrants issued through Interpol.
She said judges will have to be answerable.