According to the NAB Islamabad spokesman, the members of the family may face travel restriction if listed on the ECL. An accountability court had earlier declared Hussain and Hassan proclaimed offenders for skipping court proceedings in connection with the case. On Thursday, the NAB had requested the ministry of interior to put finance minister Ishaq Dar's name on the ECL after an accountability court issued non-bailable arrest warrants for him.
Acting on the Supreme Court's July 28 judgment in the Panama Papers case, NAB filed a case against Dar pertaining to allegations that he owns assets worth Rs 831.7 million that are disproportionate to his known sources of income.
A senior official told on condition of anonymity that NAB Lahore had written to its headquarters requesting that Hussain and Hassan's names be placed on the ECL.
The brothers, who live in the United Kingdom, are accused in three references ordered by the Supreme Court in its July 28 verdict in the Panama Papers case.
Earlier, Hassan Nawaz in apparent self-defence adopted a stance over the court's ruling that he was a foreign national and NAB orders did not apply on him.
The NAB Lahore spokesperson, however, has denied writing to the NAB headquarters or to the interior ministry asking them to place their names on the ECL.
"I and my [elder] brother are foreign national, how can NAB laws could be applied on us".
He had also claimed of not receiving summons from the anti-graft watchdog at his London residence.
On the flip side, many PML-N leaders have been making hue and cry about NAB's actions, viewing it as political victimisation against former PM Sharif and his family members.