A day earlier, the USA barred diplomats at the Pakistani Embassy from traveling outside a 25-mile radius around Washington without approval. Joseph Hall, the U.S. Embassy's military attaché in Pakistan, was prevented from leaving the country while U.S. officials were informed he could not leave until the accident was adjudicated.
The development came a day after Islamabad High Court passed a judgement that the USA diplomat did not enjoy absolute immunity.
United States military attache Col. Joseph Emanuel Hall is accused of running a red light and killing a motorcyclist on April 7 in Islamabad.
The US representatives waited for four hours at the Pakistani airbase but the FIA officials did not allow Hall to leave the country as his name was put on the blacklist by the Ministry of Interior.
A spokesman for the U.S. embassy in Islamabad declined to comment on the media reports, and a U.S. State Department spokesperson in Washington would neither confirm nor deny them.
On Saturday, Hall was prevented from boarding a USA plane, the latest twist in a dispute that has raised anti-American sentiment in Pakistan, a security ally that is increasingly at odds with the United States on major issues.
It also ordered the government to decide about adding his name to the Exit Control List, which controls the movement of people wanted by courts or those involved in corruption.
While US' ties with Pakistan have been souring, it has been strengthening relations with India.
This series of actions began January, when the United States suspended over $1.15bn in security assistance to Islamabad for its inaction over home-based terror. That came days after President Trump complained on Twitter that Pakistan had "given us nothing but lies & deceit" and accused it of providing "safe haven to the terrorists we hunt in Afghanistan".
"This is a development that could well develop into a full-blown crisis for relations if it's not resolved soon", said Michael Kugelman, a South Asia specialist at the Woodrow Wilson Center in Washington.
The father of man killed in the accident, Idris Baig, said in a recent interview that Col. Hall must face justice in Pakistan and was satisfied to see the authorities had not let him leave the country.
A spokesman for the USA embassy in Islamabad declined to comment on the events of Saturday.