April 26 (Reuters) - The chair and another board member at Oscar Properties are leaving the group, the struggling Swedish landlord said late on Thursday, as its problems continue to deepen.

The statement followed news that holders of its senior unsecured bonds were seeking immediate repayment of some 884 million Swedish crowns ($81 million).

Shares in the property group were down 30% in early trade on Friday, while the stock has lost over 99% of its value since peaking in 2017.

"It is a very bad sign that board members are leaving, the ship really seems to be sinking," said Carlsquare analyst Bertil Nilsson.

Chair Peter Norman and board member Markus Dragicevic informed the company of their resignation, Oscar Properties said in a statement, leaving only founder Oscar Engelbert on the board, according to its website.

The creditors have said they intend to file for bankruptcy of the company on Friday if payment is not made, Oscar Properties said, adding a constructive dialogue was ongoing.

High debts and interest rates combined with a slowing economy, have hit many European property companies, with the sector in Sweden among the worst affected.

The problems at Oscar Properties were exacerbated in recent quarters by some of its creditors demanding immediate repayment of loans, and two applications for it to be declared bankrupt, both of which were later withdrawn.

On Monday, Oscar Properties said the company had exhausted more than half of its share capital, and that it would call an extraordinary shareholder meeting in accordance with Swedish company law to consider its financial viability.

The landlord was set to post its fourth quarter 2023 results on Friday, after postponing publication twice. It did not immediately respond to a query whether those would be delayed again. ($1 = 10.8638 Swedish crowns) (Reporting by Greta Rosen Fondahn, Additional reporting by Marie Mannes Editing by Tomasz Janowski)