Swedish luxury carmaker Koenigsegg and Norwegian investors have signed a letter of intent with General Motors' Swedish unit Saab to take over the loss-making brand, Swedish television reported on Thursday, citing unnamed sources.

The buyers have signed a letter of intent to buy Saab, SVT said on its website.

Final negotiations about details on the deal will go on in the next months.

Saab Automobile, which was put up for sale by its now bankrupt U.S. parent earlier this year, had been in talks with two or three bidders in the past weeks.

Saab, which has said a deal could be concluded by the end of June or early July, was not immediately available for comment.