A family member of two Yemenis killed in a US drone strike in Yemen has filed a lawsuit in a US court asking the judge to declare the attack unlawful.

The lawsuit makes no demand for monetary compensation for the attack. Instead it is in effect seeking public acknowledgement that the attack killed two innocent people.

The case concerns the killing of Salem Ahmed bin Ali Jaber, an Islamic preacher in the village of Khashamir who spoke out against al-Qaeda, and Waleed bin Ali Jaber, the villages lone traffic police officer.

The men, both Yemeni citizens, were killed in a Hellfire missile strike stike on 29 August 2012.

According to the complaint Waleed "accompanied Salem as protection to an evening meeting with three youths" who are thought to have been the target of the attack.

The case has been brought by Faisal bin Ali Jaber, whose uncle and brother-in-law where killed in the attack.

Mr Ali Jaber, aided by Reprieve, the legal charity, filed the case with the Washington DC district court on Sunday.

Yemen's exiled president took a hard line Monday ahead of weekend peace talks in Geneva, ruling out negotiations with Iran-backed rebels and denouncing Tehran's "dangerous" meddling in his country.

After overrunning Sanaa in September, the Huthi rebels seized much of Yemen with the help of renegade troops loyal to former president Ali Abdullah Saleh, prompting a Saudi-led coalition to launch a bombing campaign against them on March 26.

President Abedrabbo Mansour Hadi, who has taken refuge in Riyadh, said the sole item for discussion at Sunday's talks would be the implementation of a UN resolution demanding the rebels withdraw from territory they seized.

"There will be no negotiations," Hadi told Al-Arabiya television.

"It will be just a discussion about how to implement UN Security Council Resolution 2216. We will have a consultation."